練習范圍：月日姓名 :加法交換律和結(jié)合律題數(shù)：100分秒成績 :615 + 86 + 185 =228 - 211 + 172 =235 + 253 + 265 =379 + 15 + 885 =680 - 65 - 335 =262 + 187 + 213 =919 + 194 + 206 =956 + 627 - 656 =409 + 113 + 391 =939 - 241 - 559 =5 + 348 + 95 =576 - 143 - 376 =195 + 665 - 145 =139 + 661 + 380 =972 - 220 - 672 =81 - 23 + 319 =966 - 361 - 539 =357 - 274 - 26 =712 - 686 + 88 =89 + 432 - 69 =656 + 244 + 376 =811 + 276 + 124 =554 - 409 + 346 =472 + 688 + 228 =283 + 317 + 10 =519 + 82 + 618 =27 + 352 + 23 =379 + 161 - 309 =784 - 64 - 84 =951 - 490 - 10 =621 - 150 + 79 =656 - 215 - 285 =829 - 104 - 196 =535 - 428 + 365 =189 - 36 - 119 =282 - 134 + 418 =402 - 369 - 2 =419 + 381 + 249 =662 + 462 - 462 =408 - 170 + 92 =752 - 552 + 148 =782 - 51 - 149 =745 + 681 + 55 =969 - 272 - 369 =28 + 281 + 2 =321 + 933 + 279 =226 - 115 + 474 =449 + 251 + 788 =594 - 406 + 6 =958 - 106 - 258 =193 + 607 + 958 =535 + 265 + 275 =669 - 177 - 223 =968 - 117 - 583 =558 - 56 + 42 =890 - 127 + 10 =652 - 54 - 592 =823 - 42 - 758 =772 + 686 - 572 =105 + 295 + 220 =389 + 472 + 411 =729 + 75 + 71 =325 + 826 - 225 =692 + 108 + 286 =543 - 175 - 343 =614 + 33 + 67 =324 + 276 + 519 =784 - 653 - 47 =25 + 963 + 5 =591 - 372 + 209 =597 + 303 + 778 =953 - 383 - 253 =701 - 698 - 1 =98 + 52 + 202 =525 - 501 + 75 =649 + 305 - 579 =75 + 305 + 825 =809 - 290 - 309 =804 - 647 - 104 =944 - 385 - 15 =514 - 46 + 86 =873 + 380 + 420 =286 + 173 - 206 =581 + 253 + 47 =796 + 333 - 196 =676 + 224 + 276 =266 + 610 + 434 =722 - 283 + 78 =409 + 876 + 291 =338 + 206 + 94 =785 + 115 + 144 =40 + 361 + 50 =11 + 834 + 689 =89 + 558 + 611 =105 + 881 + 595 =237 + 212 + 588 =376 - 66 + 124 =79 + 660 + 140 =574 - 411 - 89 =168 + 82 + 18 =練習范圍：加法交換律和結(jié)合 律 題數(shù)：100月分日秒姓名 :成績 :120 + 780 + 979 =592 + 308 + 44 =129 + 571 + 126 =992 + 231 + 69 =101 + 521 + 379 =883 - 716 - 84 =623 - 328 - 172 =858 + 349 - 838 =651 - 8 + 149 =661 - 2 + 239 =990 + 223 + 377 =697 + 5 + 5 =608 - 274 - 126 =942 - 345 - 342 =493 - 366 + 407 =534 + 502 + 266 =456 + 6 + 894 =587 + 115 - 187 =516 - 234 - 16 =149 + 414 + 551 =204 + 674 + 226 =287 + 304 + 513 =389 + 616 + 284 =874 - 16 - 34 =391 + 109 + 20 =709 + 207 + 593 =234 - 208 + 566 =107 - 36 - 54 =278 + 122 + 649 =96 + 704 + 111 =603 - 401 - 103 =819 - 157 - 243 =362 - 63 + 138 =21 + 249 - 1 =585 - 319 + 115 =696 + 954 + 204 =333 + 521 - 253 =365 - 29 - 305 =920 + 120 - 880 =565 - 291 - 165 =547 + 153 + 851 =210 + 771 + 29 =593 - 56 - 44 =337 - 196 - 104 =910 + 814 - 820 =458 + 235 + 165 =264 - 158 + 336 =575 + 9 + 11 =644 + 899 - 554 =282 + 223 + 418 =936 + 386 - 846 =115 + 172 + 185 =802 - 408 - 292 =963 + 37 + 53 =795 - 770 + 5 =712 + 2 - 652 =808 - 401 - 108 =945 - 89 - 445 =79 + 821 + 483 =286 + 214 + 505 =335 - 15 + 65 =213 + 287 + 257 =145 + 758 - 75 =326 + 474 + 301 =627 - 16 - 567 =152 + 526 + 148 =526 + 252 + 248 =347 + 553 + 555 =243 - 164 + 657 =398 + 648 - 98 =981 - 76 - 381 =936 - 93 - 707 =918 - 428 - 272 =701 - 472 - 1 =776 - 205 - 195 =215 + 271 - 115 =94 + 159 + 241 =866 - 311 - 189 =126 + 455 + 474 =563 + 137 + 838 =526 + 802 + 74 =667 + 33 + 309 =961 - 169 - 61 =682 + 45 + 855 =254 - 164 + 546 =456 + 244 + 935 =248 + 630 + 652 =289 + 89 + 611 =133 + 667 + 226 =54 - 43 + 846 =385 + 54 + 546 =145 + 716 + 655 =841 - 285 - 115 =936 - 303 - 136 =171 - 116 + 629 =857 + 549 - 767 =189 - 59 + 611 =405 + 262 + 238 =43 + 186 + 757 =805 - 590 - 110 =練習范圍：加法交換律和結(jié)合 律 題數(shù)：100月分日秒姓名 :成績 :1000 - 279 - 521 =164 + 374 + 336 =537 - 257 + 363 =20 + 66 + 734 =200 + 195 - 180 =232 + 173 - 222 =657 - 47 - 43 =4 + 685 + 16 =922 - 168 - 332 =561 - 57 - 471 =727 - 68 - 32 =558 + 441 + 242 =921 - 3 - 67 =851 + 103 + 397 =635 + 840 - 235 =677 + 223 + 28 =113 - 51 + 87 =154 - 147 + 546 =611 - 571 + 289 =783 - 174 - 226 =505 - 449 - 51 =443 + 357 + 729 =829 - 119 + 71 =184 - 46 - 44 =697 - 592 + 103 =597 - 106 + 103 =678 - 75 + 222 =437 - 165 + 163 =517 + 11 + 39 =690 - 79 - 521 =883 - 68 - 22 =572 + 351 - 552 =130 - 5 - 120 =562 - 102 + 338 =708 - 113 + 192 =71 + 506 + 194 =693 - 9 + 207 =522 - 171 - 129 =312 + 188 + 500 =914 - 306 - 294 =106 + 652 - 56 =421 + 963 - 21 =633 - 354 - 46 =348 + 22 + 478 =319 + 566 + 81 =893 + 25 + 25 =878 + 42 + 458 =3 + 297 + 99 =375 - 64 - 36 =136 - 112 + 64 =798 - 778 + 2 =145 + 10 + 655 =988 + 546 - 688 =143 + 318 - 93 =729 - 84 - 16 =130 + 26 + 470 =161 - 159 + 239 =67 + 533 + 768 =139 + 661 + 681 =900 - 271 - 429 =791 + 50 + 10 =346 + 773 - 266 =478 - 340 + 22 =798 - 336 + 2 =243 + 319 + 81 =6 + 54 + 575 =828 + 299 - 748 =158 + 542 + 795 =497 + 419 - 197 =145 + 355 + 283 =299 - 197 + 501 =722 - 562 - 22 =210 + 627 + 73 =506 - 36 - 426 =608 + 780 + 20 =706 + 194 + 314 =684 + 644 + 56 =395 - 73 - 127 =544 - 38 - 494 =489 - 295 + 311 =888 + 748 - 808 =840 - 175 - 125 =490 + 110 + 830 =95 + 683 + 217 =650 - 228 - 50 =657 + 170 + 530 =578 - 319 + 22 =835 - 179 - 521 =424 - 73 - 124 =758 - 257 + 42 =136 + 364 + 196 =5 + 95 + 45 =716 - 139 - 561 =992 + 155 + 745 =284 + 216 + 200 =671 - 388 + 29 =122 + 678 + 83 =8 + 392 + 47 =624 - 352 - 224 =710 - 399 - 110 =練習范圍：加法交換律和結(jié)合 律 題數(shù)：100月分日秒姓名 :成績 :362 + 646 - 332 =108 - 55 + 192 =272 + 515 + 285 =62 + 147 + 238 =234 + 15 + 15 =866 - 125 - 466 =718 - 28 - 172 =397 + 303 + 17 =599 + 301 + 384 =117 + 275 + 225 =139 + 37 + 763 =521 + 79 + 767 =304 + 296 + 97 =215 + 182 + 285 =472 - 180 + 28 =997 + 685 + 215 =774 + 579 + 221 =959 - 395 - 259 =207 + 493 + 238 =950 + 728 + 72 =377 - 281 - 77 =181 + 319 + 519 =507 + 393 + 146 =974 - 143 - 557 =230 + 95 + 205 =57 + 97 + 243 =681 - 500 - 81 =218 + 82 + 737 =533 - 48 - 152 =397 + 3 + 745 =918 + 468 - 818 =354 + 8 + 392 =400 + 947 + 400 =823 - 172 - 528 =114 + 186 + 479 =949 + 729 - 549 =730 - 133 - 467 =69 + 431 + 682 =760 - 118 - 382 =218 - 73 - 18 =171 - 4 - 76 =670 - 34 - 470 =496 + 104 + 970 =518 + 15 + 82 =594 - 383 + 306 =787 - 185 - 387 =879 + 496 - 479 =663 - 627 + 37 =57 + 33 + 962 =150 + 344 + 56 =89 + 811 + 809 =53 + 145 + 17 =760 + 229 + 271 =551 - 10 - 461 =168 + 250 + 132 =376 + 63 - 306 =491 + 177 + 9 =505 - 86 + 295 =27 + 113 + 473 =168 - 44 - 56 =177 + 323 + 781 =865 - 426 + 35 =379 - 75 - 299 =819 + 381 + 219 =644 - 225 - 375 =320 + 147 + 253 =576 - 84 + 224 =299 + 101 + 543 =216 + 436 + 484 =60 + 0 + 510 =695 - 301 - 299 =411 - 55 - 45 =248 + 270 + 652 =846 - 91 - 509 =35 + 365 + 536 =472 + 38 - 462 =413 - 61 + 187 =679 - 285 - 179 =892 - 296 - 192 =655 - 165 - 455 =418 + 757 + 82 =782 - 216 - 184 =919 + 588 + 312 =738 + 62 + 761 =917 - 890 - 10 =304 + 148 + 52 =719 - 223 - 177 =637 - 377 + 163 =341 + 182 - 141 =140 - 51 - 49 =44 + 643 + 46 =628 - 163 - 228 =567 - 236 - 64 =229 - 220 + 271 =168 + 259 + 232 =400 + 349 - 390 =554 + 420 + 246 =672 + 128 + 578 =439 + 474 + 461 =917 - 317 - 583 =練習范圍：加法交換律和結(jié)合 律 題數(shù)：100月分日秒姓名 :成績 :511 - 482 + 289 =252 + 248 + 472 =312 + 88 + 960 =620 - 356 - 144 =11 + 937 + 489 =680 + 584 + 316 =265 + 335 + 941 =460 - 250 + 440 =685 - 24 - 595 =474 + 268 + 132 =940 + 352 - 910 =749 - 472 - 28 =659 + 399 + 1 =366 + 919 + 534 =960 + 297 + 503 =5 + 695 + 559 =330 + 250 + 570 =185 + 841 - 95 =835 - 586 - 214 =981 + 365 + 35 =991 + 200 + 300 =570 + 412 + 188 =584 + 931 - 554 =835 - 39 - 661 =894 - 809 + 6 =53 + 17 + 566 =863 + 332 + 68 =929 + 153 + 347 =741 + 159 + 664 =211 + 240 - 171 =566 + 739 + 134 =827 - 357 - 427 =544 + 861 + 39 =78 + 442 + 2 =806 - 156 - 606 =27 + 43 + 862 =912 - 543 - 12 =210 + 290 + 850 =262 + 235 + 438 =893 - 586 - 214 =692 - 113 - 187 =358 + 542 + 356 =12 + 856 + 18 =449 + 921 - 429 =100 + 40 + 50 =179 + 597 + 321 =927 - 224 - 527 =251 + 459 - 51 =213 + 340 + 560 =307 + 493 + 841 =100 + 400 + 293 =770 + 786 - 670 =421 - 179 - 221 =586 + 250 - 506 =491 + 209 + 252 =940 - 65 - 35 =437 - 321 + 463 =412 + 288 + 156 =104 + 796 + 771 =507 + 93 + 692 =560 - 5 - 75 =714 + 775 - 684 =798 + 458 + 442 =515 + 444 + 285 =763 - 308 - 292 =872 - 278 - 372 =207 + 710 + 190 =488 + 353 + 547 =946 - 442 - 246 =983 - 349 - 551 =749 + 4 + 296 =281 + 219 + 319 =147 - 17 - 23 =561 + 289 + 411 =258 + 442 + 304 =289 - 168 + 311 =851 - 9 - 11 =537 + 296 + 163 =99 + 201 + 260 =932 - 446 - 154 =925 - 88 - 835 =949 - 363 - 149 =718 + 10 - 418 =329 + 684 - 229 =372 + 228 + 576 =598 - 26 - 474 =148 + 665 + 752 =426 - 251 - 126 =802 - 582 - 118 =34 + 324 + 16 =686 - 265 + 214 =591 + 171 - 541 =735 - 215 - 185 =715 - 596 - 104 =233 + 101 - 183 =562 - 66 - 4 =217 + 34 + 266 =110 - 34 + 390 =655 + 194 + 45 =443 - 51 - 149 =練習范圍：加法交換律和結(jié)合 律 題數(shù)：100月分日秒姓名 :成績 :50 + 89 + 211 =554 + 27 + 43 =787 - 196 - 587 =188 + 284 + 412 =740 - 626 - 40 =938 + 378 - 438 =393 + 53 + 307 =459 - 269 + 341 =922 - 696 - 4 =216 + 773 + 284 =766 - 199 - 366 =664 + 951 - 164 =319 + 481 + 563 =629 + 853 - 429 =442 + 58 + 373 =401 + 408 + 499 =60 + 40 + 33 =664 + 136 + 487 =234 + 531 + 369 =501 + 857 - 421 =128 + 939 + 172 =845 + 358 - 795 =347 + 153 + 71 =567 + 271 + 629 =671 - 588 + 229 =611 + 698 + 2 =634 + 494 + 266 =719 - 647 - 19 =682 + 546 - 82 =587 - 3 - 527 =791 - 40 - 191 =525 - 25 - 475 =649 + 605 - 569 =551 - 482 + 249 =542 - 501 + 158 =406 + 989 + 194 =453 + 111 + 689 =731 - 663 + 69 =985 - 762 - 185 =558 - 125 - 58 =903 + 287 - 3 =397 + 854 - 297 =118 + 323 + 182 =500 - 29 + 200 =552 + 679 - 52 =286 + 563 + 114 =911 - 321 - 311 =461 + 439 + 804 =429 - 15 - 359 =10 + 890 + 435 =592 + 387 + 308 =388 + 402 - 338 =425 + 475 + 311 =18 + 225 + 382 =559 + 241 + 276 =479 + 405 - 379 =838 + 56 - 138 =243 - 86 - 114 =526 - 32 - 38 =627 - 114 + 73 =834 + 12 + 68 =628 - 233 - 128 =759 - 603 + 141 =398 - 33 + 102 =75 + 932 + 825 =785 + 549 + 251 =143 - 91 + 457 =4 + 696 + 183 =340 + 53 + 347 =827 - 10 - 427 =626 - 129 - 371 =390 + 210 + 141 =703 - 58 - 203 =111 + 389 + 378 =199 + 277 + 323 =507 - 485 + 293 =283 - 130 + 117 =68 + 232 + 923 =983 + 286 - 883 =499 + 201 + 183 =476 - 287 - 76 =727 + 36 + 464 =832 - 106 - 432 =412 + 655 - 342 =477 - 476 + 323 =4 + 740 + 296 =737 - 7 - 337 =431 + 702 - 411 =987 - 18 - 82 =319 + 168 - 229 =172 + 51 + 528 =994 - 747 - 53 =958 - 200 - 200 =150 + 450 + 56 =36 + 528 + 864 =179 - 177 + 721 =726 + 269 + 531 =606 - 293 - 307 =924 - 59 - 124 =36 + 875 + 464 =練習范圍：加法交換律和結(jié)合 律 題數(shù)：100月分日秒姓名 :成績 :893 + 778 + 122 =689 + 370 + 11 =145 + 755 + 828 =839 - 89 - 311 =671 - 29 - 51 =234 + 298 + 202 =790 - 264 - 390 =628 + 172 + 571 =798 - 140 - 60 =190 + 445 + 410 =886 + 14 + 808 =195 - 36 - 34 =526 + 4 + 86 =66 + 534 + 874 =742 - 6 - 54 =925 + 180 + 620 =31 + 43 + 469 =969 - 497 - 103 =939 - 226 - 674 =484 - 370 + 316 =898 - 413 - 87 =355 - 224 + 545 =924 - 450 - 350 =594 - 140 - 160 =592 + 182 - 552 =366 - 106 + 234 =424 + 889 + 376 =618 - 520 + 182 = 60 - 3 - 47 =324 + 561 - 284 =85 + 382 + 215 =834 + 139 + 761 =475 - 13 - 425 =217 + 13 + 37 =700 + 566 + 34 =653 + 455 - 453 =44 + 506 + 856 =164 - 60 + 636 =839 + 350 + 50 =913 + 712 - 863 =5 + 75 + 43 =50 + 351 - 30 =906 + 814 - 706 =403 + 504 - 383 =358 + 342 + 633 =905 + 875 - 205 =306 + 167 + 394 =467 + 181 + 619 =275 + 665 - 265 =265 + 873 + 27 =95 + 860 + 705 =218 + 630 - 178 =455 - 171 + 245 =476 + 790 + 24 =669 - 432 + 31 =875 - 185 - 75 =359 + 241 + 278 =3 + 77 + 140 =12 + 278 + 588 =416 - 97 + 384 =184 + 267 + 433 =686 + 972 - 636 =398 + 202 + 904 =4 + 596 + 173 =308 - 19 - 108 =428 + 15 + 785 =785 - 420 - 185 =593 - 481 + 307 =291 - 39 + 509 =325 + 175 + 822 =34 + 61 + 666 =871 - 430 - 370 =68 - 12 - 18 =642 + 158 + 222 =496 + 204 + 29 =891 - 805 + 9 =512 + 238 + 162 =713 - 13 - 693 =806 - 56 - 44 =561 + 32 - 501 =335 + 326 - 235 =319 - 179 - 21 =508 + 414 + 292 =495 + 614 - 445 =325 + 197 + 103 =837 - 529 - 71 =715 - 84 + 85 =545 - 474 + 355 =938 + 371 + 429 =553 - 32 - 453 =364 + 111 + 136 =826 - 10 - 790 =655 - 603 + 45 =864 - 93 - 707 =934 - 31 - 169 =235 + 818 + 165 =768 - 296 + 32 =113 + 164 + 387 =730 + 787 + 113 =596 + 433 + 367 =練習范圍：加法交換律和結(jié)合 律 題數(shù)：100月分日秒姓名 :成績 :438 - 128 + 262 =52 + 940 + 28 =983 - 681 - 83 =535 - 285 + 365 =4 + 165 + 335 =835 - 516 - 135 =749 - 216 - 84 =560 - 297 - 103 =679 - 23 - 379 =715 - 7 - 705 =872 - 498 - 72 =97 + 227 + 173 =750 - 555 - 145 =204 + 792 - 104 =343 + 312 + 88 =509 + 291 + 334 =652 - 38 - 592 =136 + 364 + 223 =756 - 522 - 56 =975 - 71 - 775 =991 - 11 - 191 =652 + 290 + 610 =842 - 78 - 142 =671 - 210 - 190 =665 - 66 + 35 =945 - 767 - 45 =575 - 515 + 225 =360 + 40 + 99 =462 + 238 + 401 =484 + 316 + 634 =186 + 250 + 350 =812 + 547 + 353 =30 + 304 + 196 =700 - 27 + 200 =476 - 93 + 24 =150 - 80 + 750 =427 - 145 + 173 =473 - 399 + 127 =115 - 10 + 385 =138 - 55 + 162 =943 - 600 - 200 =873 - 77 - 673 =410 + 90 + 134 =801 - 95 - 101 =192 + 8 + 961 =885 - 238 - 462 =138 + 981 + 162 =934 - 31 - 834 =97 + 19 + 71 =559 - 106 - 194 =942 - 167 - 642 =78 + 13 + 12 =129 + 674 + 471 =558 - 300 - 158 =189 + 211 + 875 =632 + 421 + 168 =417 + 657 + 383 =756 - 501 - 56 =461 + 543 - 451 =895 + 15 - 855 =25 + 463 + 237 =65 - 15 + 5 =505 - 17 - 483 =805 + 782 - 605 =3 + 729 + 797 =578 - 62 - 138 =146 + 819 + 81 =214 + 925 - 204 =17 + 283 + 860 =10 + 146 + 80 =741 - 378 - 122 =19 + 766 + 781 =164 + 698 - 124 =67 + 633 + 364 =82 + 861 - 52 =576 - 78 - 276 =152 + 378 - 62 =870 - 199 - 301 =178 - 165 + 222 =81 + 768 + 32 =942 - 25 - 42 =130 - 60 + 70 =523 - 186 + 177 =745 + 651 + 249 =789 - 205 - 89 =489 - 40 - 160 =367 - 128 + 433 =382 - 194 + 118 =127 + 118 + 382 =723 + 234 - 323 =727 - 465 + 73 =668 + 423 + 177 =981 - 23 - 911 =33 + 667 + 537 =190 + 240 - 160 =855 + 662 + 238 =337 + 997 + 263 =981 + 452 - 281 =213 + 587 + 96 =884 - 49 - 484 =練習范圍：加法交換律和結(jié)合 律 題數(shù)：100月分日秒姓名 :成績 :943 + 192 + 8 =703 - 73 - 623 =527 - 177 - 323 =268 + 190 + 432 =881 - 38 - 281 =243 - 156 + 457 =574 - 360 + 226 =922 - 191 - 222 =384 + 917 + 516 =930 + 63 + 437 =715 - 274 - 215 =1 + 19 + 472 =113 - 20 + 587 =16 + 383 + 484 =289 - 4 - 199 =470 + 930 - 440 =507 + 981 + 393 =749 + 974 - 549 =651 - 514 + 49 =362 - 181 - 162 =997 - 439 - 161 =626 + 55 - 616 =689 - 72 + 111 =667 + 3 + 397 =94 + 291 - 34 =530 + 550 - 130 =77 + 579 + 723 =748 + 647 + 153 =471 + 510 + 90 =205 - 50 + 95 =165 + 777 + 335 =364 + 156 + 436 =767 + 775 - 727 =829 - 74 - 726 =569 - 329 + 31 =100 + 200 + 871 =606 + 294 + 337 =165 - 29 - 31 =768 + 731 - 738 =227 + 442 + 358 =276 + 145 - 206 =485 - 104 - 196 =728 - 287 - 128 =595 + 212 - 525 =243 + 157 + 102 =765 + 692 + 35 =1 + 402 + 99 =37 + 43 + 283 =946 + 94 - 746 =189 - 94 + 411 =48 + 847 + 53 =623 - 380 + 277 =852 + 785 - 52 =537 - 121 - 379 =818 - 784 - 16 =928 - 18 - 52 =728 + 802 - 228 =246 + 192 + 608 =948 + 405 + 195 =262 + 773 - 162 =535 + 310 - 35 =299 + 380 + 401 =643 + 192 + 608 =965 + 672 - 565 =203 + 83 + 517 =695 - 623 + 5 =746 - 270 + 154 =511 - 2 - 411 =918 - 113 - 787 =825 - 744 + 75 =684 - 8 - 32 =777 + 153 + 123 =749 - 564 - 136 =575 + 921 - 475 =730 - 412 - 88 =124 + 748 + 176 =382 - 39 - 292 =971 - 13 - 387 =628 + 336 - 588 =34 + 159 + 36 =47 + 853 + 877 =58 + 32 + 711 =688 + 335 - 608 =747 + 630 - 347 =749 + 52 + 51 =722 + 126 + 674 =578 + 240 - 528 =126 + 191 + 309 =793 - 347 + 7 =804 - 14 - 754 =683 + 247 + 217 =94 + 506 + 327 =664 + 629 - 584 =451 + 575 + 225 =787 - 195 + 13 =954 - 469 - 454 =655 + 45 + 229 =798 + 508 + 292 =72 + 497 + 428 =757 - 46 - 667 =練習范圍：加法交換律和結(jié)合 律 題數(shù)：100月分日秒姓名 :成績 :270 + 11 + 89 =692 + 588 + 108 =11 + 289 + 332 =264 - 82 - 174 =267 + 433 + 362 =682 - 70 - 20 =626 - 357 + 74 =690 - 201 - 199 =666 + 234 + 618 =888 - 598 - 202 =774 - 331 + 126 =829 - 122 + 71 =465 - 115 + 35 =573 + 926 - 543 =560 - 260 + 40 =469 - 190 - 169 =6 + 932 + 44 =57 + 637 + 543 =897 - 15 - 85 =69 + 631 + 967 =133 + 667 + 928 =741 - 321 - 241 =752 + 233 - 652 =225 - 36 - 24 =964 + 578 + 22 =300 + 204 + 96 =706 - 596 - 106 =718 + 65 + 435 =956 + 388 + 212 =560 + 110 + 190 =320 + 360 + 440 =983 - 116 - 683 =343 + 899 + 57 =303 - 63 + 497 =92 + 15 + 15 =383 + 705 - 323 =324 + 212 - 304 =210 + 933 + 90 =540 - 486 + 160 =801 - 112 - 688 =580 + 454 + 446 =490 - 485 + 10 =10 + 790 + 176 =794 - 26 - 714 =498 - 80 - 20 =670 - 23 - 580 =827 + 926 - 427 =909 - 315 - 509 =