四年级下册 运算律（笔算）
姓名：_______________
学号：_______________
用时：_______________
| 36 + 28 + 21 = (36 + __) + 21 | (10 + 4) × 3 = 30 + __ |
| 6 + 38 + 27 = (6 + __) + 27 | 70 + 60 = 60 + __ |
| 18 + 65 = 65 + __ | 97 × 4 = 100 × 4 - __ × 4 |
| 54 × 5 = 5 × __ | 99 × 6 = 100 × 6 - __ × 6 |
| 4 × 4 = 4 × __ | 15 + 96 = 96 + __ |
| (5 + 2) × 5 = 25 + __ | 44 + 27 + 28 = (44 + __) + 28 |
| (14 + 10) × 8 = 112 + __ | 97 × 2 = (100 - __) × 2 |
| 96 × 2 = 100 × 2 - __ × 2 | (5 + 16) × 4 = 20 + __ |
| 93 × 4 = 4 × __ | 99 × 6 = (100 - __) × 6 |
| (20 + 9) × 8 = 160 + __ | 30 + 6 + 2 = (30 + __) + 2 |
| 5 + 28 + 39 = (5 + __) + 39 | 49 + 80 = 80 + __ |
| 44 + 47 + 7 = (44 + __) + 7 | 60 × 6 = 6 × __ |
| 98 × 4 = (100 - __) × 4 | 1 + 48 + 37 = (1 + __) + 37 |
| 79 × 9 = 9 × __ | 10 × 4 = 4 × __ |
| 35 + 73 = 73 + __ | (13 + 1) × 7 = 91 + __ |
| (16 + 7) × 9 = 144 + __ | (20 + 9) × 7 = 140 + __ |
| 93 × 2 = 2 × __ | 97 + 61 = 61 + __ |
| 14 + 27 + 38 = (14 + __) + 38 | 88 + 98 = 98 + __ |
四年级下册 运算律（笔算）（答案）
姓名：_______________
学号：_______________
用时：_______________
| 36 + 28 + 21 = (36 + __) + 21 28 | (10 + 4) × 3 = 30 + __ 12 |
| 6 + 38 + 27 = (6 + __) + 27 38 | 70 + 60 = 60 + __ 70 |
| 18 + 65 = 65 + __ 18 | 97 × 4 = 100 × 4 - __ × 4 3 |
| 54 × 5 = 5 × __ 54 | 99 × 6 = 100 × 6 - __ × 6 1 |
| 4 × 4 = 4 × __ 4 | 15 + 96 = 96 + __ 15 |
| (5 + 2) × 5 = 25 + __ 10 | 44 + 27 + 28 = (44 + __) + 28 27 |
| (14 + 10) × 8 = 112 + __ 80 | 97 × 2 = (100 - __) × 2 3 |
| 96 × 2 = 100 × 2 - __ × 2 4 | (5 + 16) × 4 = 20 + __ 64 |
| 93 × 4 = 4 × __ 93 | 99 × 6 = (100 - __) × 6 1 |
| (20 + 9) × 8 = 160 + __ 72 | 30 + 6 + 2 = (30 + __) + 2 6 |
| 5 + 28 + 39 = (5 + __) + 39 28 | 49 + 80 = 80 + __ 49 |
| 44 + 47 + 7 = (44 + __) + 7 47 | 60 × 6 = 6 × __ 60 |
| 98 × 4 = (100 - __) × 4 2 | 1 + 48 + 37 = (1 + __) + 37 48 |
| 79 × 9 = 9 × __ 79 | 10 × 4 = 4 × __ 10 |
| 35 + 73 = 73 + __ 35 | (13 + 1) × 7 = 91 + __ 7 |
| (16 + 7) × 9 = 144 + __ 63 | (20 + 9) × 7 = 140 + __ 63 |
| 93 × 2 = 2 × __ 93 | 97 + 61 = 61 + __ 97 |
| 14 + 27 + 38 = (14 + __) + 38 27 | 88 + 98 = 98 + __ 88 |