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四年级下册运算律（笔算）

姓名：_______________ 学号：_______________ 用时：_______________

97 × 8 = (100 - __) × 8 3	42 + 87 = 87 + __ 42
35 + 8 + 14 = (35 + __) + 14 8	34 + 19 + 5 = (34 + __) + 5 19
98 × 9 = (100 - __) × 9 2	(16 + 8) × 3 = 48 + __ 24
77 + 32 = 32 + __ 77	75 × 9 = 9 × __ 75
73 + 29 = 29 + __ 73	2 + 17 + 23 = (2 + __) + 23 17
34 + 73 = 73 + __ 34	58 × 4 = 4 × __ 58
96 × 3 = 100 × 3 - __ × 3 4	1 + 3 + 35 = (1 + __) + 35 3
42 × 9 = 9 × __ 42	92 × 2 = 2 × __ 92
16 + 46 = 46 + __ 16	10 + 27 + 22 = (10 + __) + 22 27
(18 + 9) × 9 = 162 + __ 81	8 + 2 + 36 = (8 + __) + 36 2
(16 + 3) × 4 = 64 + __ 12	92 × 8 = 8 × __ 92
12 × 7 = 7 × __ 12	(20 + 12) × 2 = 40 + __ 24
95 × 3 = (100 - __) × 3 5	99 × 5 = 100 × 5 - __ × 5 1
96 × 8 = 100 × 8 - __ × 8 4	35 + 34 + 5 = (35 + __) + 5 34
(14 + 13) × 2 = 28 + __ 26	47 × 5 = 5 × __ 47
75 + 52 = 52 + __ 75	12 + 50 + 41 = (12 + __) + 41 50
41 + 8 + 1 = (41 + __) + 1 8	53 + 94 = 94 + __ 53
6 × 8 = 8 × __ 6	(8 + 12) × 5 = 40 + __ 60

四年级下册运算律（笔算）（答案）

姓名：_______________ 学号：_______________ 用时：_______________

97 × 8 = (100 - __) × 8 3	42 + 87 = 87 + __ 42
35 + 8 + 14 = (35 + __) + 14 8	34 + 19 + 5 = (34 + __) + 5 19
98 × 9 = (100 - __) × 9 2	(16 + 8) × 3 = 48 + __ 24
77 + 32 = 32 + __ 77	75 × 9 = 9 × __ 75
73 + 29 = 29 + __ 73	2 + 17 + 23 = (2 + __) + 23 17
34 + 73 = 73 + __ 34	58 × 4 = 4 × __ 58
96 × 3 = 100 × 3 - __ × 3 4	1 + 3 + 35 = (1 + __) + 35 3
42 × 9 = 9 × __ 42	92 × 2 = 2 × __ 92
16 + 46 = 46 + __ 16	10 + 27 + 22 = (10 + __) + 22 27
(18 + 9) × 9 = 162 + __ 81	8 + 2 + 36 = (8 + __) + 36 2
(16 + 3) × 4 = 64 + __ 12	92 × 8 = 8 × __ 92
12 × 7 = 7 × __ 12	(20 + 12) × 2 = 40 + __ 24
95 × 3 = (100 - __) × 3 5	99 × 5 = 100 × 5 - __ × 5 1
96 × 8 = 100 × 8 - __ × 8 4	35 + 34 + 5 = (35 + __) + 5 34
(14 + 13) × 2 = 28 + __ 26	47 × 5 = 5 × __ 47
75 + 52 = 52 + __ 75	12 + 50 + 41 = (12 + __) + 41 50
41 + 8 + 1 = (41 + __) + 1 8	53 + 94 = 94 + __ 53
6 × 8 = 8 × __ 6	(8 + 12) × 5 = 40 + __ 60

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