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四年级下册运算律（笔算）

姓名：_______________ 学号：_______________ 用时：_______________

11 + 97 = 97 + __ 11	95 × 9 = (100 - __) × 9 5
42 + 54 = 54 + __ 42	31 + 78 = 78 + __ 31
45 + 46 + 36 = (45 + __) + 36 46	(12 + 5) × 5 = 60 + __ 25
(2 + 9) × 7 = 14 + __ 63	97 × 5 = 100 × 5 - __ × 5 3
41 + 72 = 72 + __ 41	19 + 9 + 48 = (19 + __) + 48 9
89 × 7 = 7 × __ 89	(6 + 17) × 3 = 18 + __ 51
95 × 5 = (100 - __) × 5 5	99 × 4 = (100 - __) × 4 1
32 + 45 + 30 = (32 + __) + 30 45	39 × 7 = 7 × __ 39
38 × 7 = 7 × __ 38	77 + 27 = 27 + __ 77
38 × 5 = 5 × __ 38	95 × 8 = 8 × __ 95
(14 + 5) × 8 = 112 + __ 40	13 + 56 = 56 + __ 13
97 × 3 = 100 × 3 - __ × 3 3	97 × 2 = 100 × 2 - __ × 2 3
25 × 6 = 6 × __ 25	(1 + 18) × 6 = 6 + __ 108
11 + 30 + 34 = (11 + __) + 34 30	91 + 19 = 19 + __ 91
96 × 9 = (100 - __) × 9 4	98 × 8 = 100 × 8 - __ × 8 2
42 + 24 + 15 = (42 + __) + 15 24	(18 + 11) × 2 = 36 + __ 22
97 × 4 = 100 × 4 - __ × 4 3	(7 + 14) × 8 = 56 + __ 112
(13 + 20) × 2 = 26 + __ 40	23 × 5 = 5 × __ 23

四年级下册运算律（笔算）（答案）

姓名：_______________ 学号：_______________ 用时：_______________

11 + 97 = 97 + __ 11	95 × 9 = (100 - __) × 9 5
42 + 54 = 54 + __ 42	31 + 78 = 78 + __ 31
45 + 46 + 36 = (45 + __) + 36 46	(12 + 5) × 5 = 60 + __ 25
(2 + 9) × 7 = 14 + __ 63	97 × 5 = 100 × 5 - __ × 5 3
41 + 72 = 72 + __ 41	19 + 9 + 48 = (19 + __) + 48 9
89 × 7 = 7 × __ 89	(6 + 17) × 3 = 18 + __ 51
95 × 5 = (100 - __) × 5 5	99 × 4 = (100 - __) × 4 1
32 + 45 + 30 = (32 + __) + 30 45	39 × 7 = 7 × __ 39
38 × 7 = 7 × __ 38	77 + 27 = 27 + __ 77
38 × 5 = 5 × __ 38	95 × 8 = 8 × __ 95
(14 + 5) × 8 = 112 + __ 40	13 + 56 = 56 + __ 13
97 × 3 = 100 × 3 - __ × 3 3	97 × 2 = 100 × 2 - __ × 2 3
25 × 6 = 6 × __ 25	(1 + 18) × 6 = 6 + __ 108
11 + 30 + 34 = (11 + __) + 34 30	91 + 19 = 19 + __ 91
96 × 9 = (100 - __) × 9 4	98 × 8 = 100 × 8 - __ × 8 2
42 + 24 + 15 = (42 + __) + 15 24	(18 + 11) × 2 = 36 + __ 22
97 × 4 = 100 × 4 - __ × 4 3	(7 + 14) × 8 = 56 + __ 112
(13 + 20) × 2 = 26 + __ 40	23 × 5 = 5 × __ 23

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