100 减法 30 等于多少？
100 - 30 = 70
100减法30 等于 70
竖式演算
验算
- 用加法验算：70 + 30 = 100
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100 - 29 = 71
100 - 31 = 69
100 - 28 = 72
100 - 32 = 68
100 - 33 = 67
100 - 27 = 73
100 - 34 = 66
100 - 26 = 74
99 - 30 = 69
98 - 30 = 68
97 - 30 = 67
96 - 30 = 66
95 - 30 = 65
94 - 30 = 64
93 - 30 = 63
92 - 30 = 62
71 - 1 = 70
72 - 2 = 70
73 - 3 = 70
74 - 4 = 70
75 - 5 = 70
76 - 6 = 70
80 - 74 = 6
22 - 7 = 15
30 - 6 = 24
80 - 57 = 23
97 - 78 = 19
25 - 17 = 8
8 + 62 = 70
25 + 45 = 70