87 减法 20 等于多少?
87 - 20 = 67
87减法20 等于 67
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验算
- 用加法验算:67 + 20 = 87
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87 - 19 = 68
87 - 21 = 66
87 - 22 = 65
87 - 18 = 69
87 - 23 = 64
87 - 17 = 70
87 - 24 = 63
87 - 16 = 71
86 - 20 = 66
88 - 20 = 68
85 - 20 = 65
89 - 20 = 69
84 - 20 = 64
90 - 20 = 70
83 - 20 = 63
91 - 20 = 71
68 - 1 = 67
69 - 2 = 67
70 - 3 = 67
71 - 4 = 67
72 - 5 = 67
73 - 6 = 67
88 - 11 = 77
20 - 10 = 10
98 - 33 = 65
13 - 2 = 11
36 - 22 = 14
39 - 1 = 38
41 + 26 = 67
49 + 18 = 67