四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 36 + 43 + 9 = (36 + __) + 9 | (1 + 19) × 5 = 5 + __ |
| 43 + 19 + 47 = (43 + __) + 47 | 71 × 6 = 6 × __ |
| 98 × 4 = 100 × 4 - __ × 4 | 1 + 16 + 1 = (1 + __) + 1 |
| 22 + 27 = 27 + __ | 95 × 4 = (100 - __) × 4 |
| (4 + 6) × 5 = 20 + __ | 29 + 31 + 47 = (29 + __) + 47 |
| (20 + 17) × 9 = 180 + __ | 77 × 4 = 4 × __ |
| (3 + 13) × 7 = 21 + __ | 97 × 2 = 100 × 2 - __ × 2 |
| (5 + 15) × 7 = 35 + __ | 8 + 1 + 30 = (8 + __) + 30 |
| 16 × 3 = 3 × __ | 3 × 2 = 2 × __ |
| 71 + 81 = 81 + __ | 32 + 33 + 20 = (32 + __) + 20 |
| (9 + 20) × 6 = 54 + __ | 99 × 4 = 100 × 4 - __ × 4 |
| (5 + 20) × 7 = 35 + __ | (13 + 20) × 7 = 91 + __ |
| 98 × 2 = 100 × 2 - __ × 2 | 78 + 25 = 25 + __ |
| 9 + 44 + 6 = (9 + __) + 6 | 95 × 6 = (100 - __) × 6 |
| 77 + 54 = 54 + __ | 98 × 6 = 100 × 6 - __ × 6 |
| 38 + 89 = 89 + __ | 48 + 9 + 13 = (48 + __) + 13 |
| 25 + 14 + 37 = (25 + __) + 37 | 35 + 44 = 44 + __ |
| (18 + 11) × 8 = 144 + __ | 98 × 7 = (100 - __) × 7 |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 36 + 43 + 9 = (36 + __) + 9 43 | (1 + 19) × 5 = 5 + __ 95 |
| 43 + 19 + 47 = (43 + __) + 47 19 | 71 × 6 = 6 × __ 71 |
| 98 × 4 = 100 × 4 - __ × 4 2 | 1 + 16 + 1 = (1 + __) + 1 16 |
| 22 + 27 = 27 + __ 22 | 95 × 4 = (100 - __) × 4 5 |
| (4 + 6) × 5 = 20 + __ 30 | 29 + 31 + 47 = (29 + __) + 47 31 |
| (20 + 17) × 9 = 180 + __ 153 | 77 × 4 = 4 × __ 77 |
| (3 + 13) × 7 = 21 + __ 91 | 97 × 2 = 100 × 2 - __ × 2 3 |
| (5 + 15) × 7 = 35 + __ 105 | 8 + 1 + 30 = (8 + __) + 30 1 |
| 16 × 3 = 3 × __ 16 | 3 × 2 = 2 × __ 3 |
| 71 + 81 = 81 + __ 71 | 32 + 33 + 20 = (32 + __) + 20 33 |
| (9 + 20) × 6 = 54 + __ 120 | 99 × 4 = 100 × 4 - __ × 4 1 |
| (5 + 20) × 7 = 35 + __ 140 | (13 + 20) × 7 = 91 + __ 140 |
| 98 × 2 = 100 × 2 - __ × 2 2 | 78 + 25 = 25 + __ 78 |
| 9 + 44 + 6 = (9 + __) + 6 44 | 95 × 6 = (100 - __) × 6 5 |
| 77 + 54 = 54 + __ 77 | 98 × 6 = 100 × 6 - __ × 6 2 |
| 38 + 89 = 89 + __ 38 | 48 + 9 + 13 = (48 + __) + 13 9 |
| 25 + 14 + 37 = (25 + __) + 37 14 | 35 + 44 = 44 + __ 35 |
| (18 + 11) × 8 = 144 + __ 88 | 98 × 7 = (100 - __) × 7 2 |