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四年级下册运算律（笔算）

姓名：_______________ 学号：_______________ 用时：_______________

92 × 5 = 5 × __ 92	99 × 4 = (100 - __) × 4 1
58 × 3 = 3 × __ 58	(9 + 12) × 5 = 45 + __ 60
39 + 63 = 63 + __ 39	69 + 81 = 81 + __ 69
79 × 4 = 4 × __ 79	5 + 1 + 45 = (5 + __) + 45 1
(20 + 7) × 6 = 120 + __ 42	23 + 29 + 40 = (23 + __) + 40 29
67 + 22 = 22 + __ 67	95 × 2 = 100 × 2 - __ × 2 5
(5 + 13) × 4 = 20 + __ 52	44 + 39 + 24 = (44 + __) + 24 39
3 + 25 + 50 = (3 + __) + 50 25	96 × 2 = 100 × 2 - __ × 2 4
97 × 3 = 100 × 3 - __ × 3 3	30 + 19 + 11 = (30 + __) + 11 19
43 + 87 = 87 + __ 43	91 + 39 = 39 + __ 91
99 × 9 = 100 × 9 - __ × 9 1	42 + 93 = 93 + __ 42
13 × 9 = 9 × __ 13	45 + 14 + 8 = (45 + __) + 8 14
98 × 3 = 100 × 3 - __ × 3 2	21 + 20 = 20 + __ 21
8 + 40 + 32 = (8 + __) + 32 40	48 × 8 = 8 × __ 48
24 + 50 + 24 = (24 + __) + 24 50	(2 + 8) × 3 = 6 + __ 24
19 + 64 = 64 + __ 19	90 × 3 = 3 × __ 90
10 + 21 + 30 = (10 + __) + 30 21	84 × 8 = 8 × __ 84
(9 + 13) × 5 = 45 + __ 65	(11 + 13) × 5 = 55 + __ 65

四年级下册运算律（笔算）（答案）

姓名：_______________ 学号：_______________ 用时：_______________

92 × 5 = 5 × __ 92	99 × 4 = (100 - __) × 4 1
58 × 3 = 3 × __ 58	(9 + 12) × 5 = 45 + __ 60
39 + 63 = 63 + __ 39	69 + 81 = 81 + __ 69
79 × 4 = 4 × __ 79	5 + 1 + 45 = (5 + __) + 45 1
(20 + 7) × 6 = 120 + __ 42	23 + 29 + 40 = (23 + __) + 40 29
67 + 22 = 22 + __ 67	95 × 2 = 100 × 2 - __ × 2 5
(5 + 13) × 4 = 20 + __ 52	44 + 39 + 24 = (44 + __) + 24 39
3 + 25 + 50 = (3 + __) + 50 25	96 × 2 = 100 × 2 - __ × 2 4
97 × 3 = 100 × 3 - __ × 3 3	30 + 19 + 11 = (30 + __) + 11 19
43 + 87 = 87 + __ 43	91 + 39 = 39 + __ 91
99 × 9 = 100 × 9 - __ × 9 1	42 + 93 = 93 + __ 42
13 × 9 = 9 × __ 13	45 + 14 + 8 = (45 + __) + 8 14
98 × 3 = 100 × 3 - __ × 3 2	21 + 20 = 20 + __ 21
8 + 40 + 32 = (8 + __) + 32 40	48 × 8 = 8 × __ 48
24 + 50 + 24 = (24 + __) + 24 50	(2 + 8) × 3 = 6 + __ 24
19 + 64 = 64 + __ 19	90 × 3 = 3 × __ 90
10 + 21 + 30 = (10 + __) + 30 21	84 × 8 = 8 × __ 84
(9 + 13) × 5 = 45 + __ 65	(11 + 13) × 5 = 55 + __ 65

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