第七单元 分数的初步认识(二)-【优佳好】2023-2024学年三年级下册数学口算计算能力提升（苏教版）

单元七 　 第 1 课时　 认识几分之一 3 年级 下 S 80 × 4 = 63 + 27 = 140 × 4 = 27 × 30 = 340 - 120 = 11 × 26 = 405 × 7 = 14 × 20 = 45 × 2 = 150 - 70 = 38 + 152 = 467 - 300 = 54 × 20 = 35 × 30 = 42 × 30 = 542 - 142 = 480 + 130 = 0 × 976 = 854 - 254 = 34 × 20 = 182 + 251 = 600 - 270 = 64 × 50 = 15 × 30 = 491 + 109 = 720 - 360 = 680 × 2 = 43 × 50 = 507 - 248 = 75 × 18 = 240 × 8 = 227 + 156 = 372 ÷ 4 = 29 × 36 = 243 × (15 ÷ 3) 8 × (136 + 129) 345 - 75 × 3 84 单元七 　 第 2 课时　 求一个数的几分之一是多少 3 年级 下 S 300 × 3 = 120 × 4 = 350 - 120 = 700 × 6 = 140 ÷ 7 = 54 × 20 = 366 ÷ 6 = 314 × 4 = 480 - 160 = 270 + 430 = 500 - 270 = 24 × 30 = 848 ÷ 8 = 107 × 3 = 236 + 264 = 438 - 138 = 750 × 2 = 490 × 6 = 34 × 10 = 205 ÷ 5 = 174 + 226 = 325 × 3 = 480 × 2 = 517 + 223 = 607 × 9 = 21 × 40 = 560 ÷ 8 = 342 ÷ 3 = 480 - 375 = 689 + 242 = 35 × 29 = 315 + 286 = 27 × 53 = 58 × 40 = 128 × (315 - 308) 273 × 6 + 500 72 ÷ 8 × 150 94 单元七 　 第 3 课时　 认识几分之几 3 年级 下 S 140 + 120 = 35 × 20 = 203 × 4 = 340 - 170 = 112 × 3 = 14 × 50 = 350 + 250 = 1 5 + 1 5 = 7 10 + 2 10 = 48 × 20 = 7 × 500 = 60 × 18 = 732 + 256 = 648 - 532 = 368 - 275 = 83 × 40 = 7 8 - 2 8 = 1 4 + 2 4 = 480 × 3 = 308 + 452 = 520 - 326 = 75 × 20 = 470 - 253 = 640 + 218 = 326 × 2 = 3 6 - 2 6 = 6 7 - 2 7 = 50 × 71 = 840 × 2 = 916 - 375 = 245 + 136 = 15 × 30 = 45 × 40 = 800 - 475 = 7 9 - 5 9 = 3 8 + 1 8 = 536 ÷ 4 = 81 × 24 = 45 × 57 = 114 + (245 - 108) 45 × (80 - 36) 117 + 41 × 23 05 单元七 　 第 4 课时　 求一个数的几分之几是多少 3 年级 下 S 15 × 2 = 270 - 140 = 630 + 180 = 800 - 450 = 14 × 30 = 75 × 2 = 32 × 40 = 30 × 5 = 304 × 2 = 511 × 3 = 936 - 600 = 320 × 2 = 204 × 4 = 160 × 4 = 22 × 40 = 140 + 350 = 307 × 5 = 217 + 183 = 42 × 30 = 115 + 185 = 740 - 290 = 81 ÷ 9 = 700 - 220 = 24 × 30 = 63 × 4 = 543 - 143 = 300 - 180 = 15 × 60 = 372 + 186 = 35 × 14 = 27 × 38 = (144 - 24) ÷ 6 244 - 6 × 28 205 - 98 + 46 351 - (164 - 88) (79 + 57) ÷ 4 480 ÷ 6 - 45 15 单元七 　 第 5 课时　 练习十 3 年级 下 S 1 4 + 1 4 = 7 9 - 6 9 = 1 - 34 = 1 5 + 2 5 = 6 7 - 3 7 = 3 8 + 3 8 = 1 - 59 = 1 8 + 2 8 = 1 7 + 3 7 = 3 9 + 4 9 = 1