72 减法 42 等于多少?
72 - 42 = 30
72减法42 等于 30
竖式演算
验算
- 用加法验算:30 + 42 = 72
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72 - 41 = 31
72 - 43 = 29
72 - 40 = 32
72 - 44 = 28
72 - 39 = 33
72 - 45 = 27
72 - 38 = 34
72 - 46 = 26
71 - 42 = 29
73 - 42 = 31
70 - 42 = 28
74 - 42 = 32
69 - 42 = 27
75 - 42 = 33
76 - 42 = 34
68 - 42 = 26
31 - 1 = 30
32 - 2 = 30
33 - 3 = 30
34 - 4 = 30
35 - 5 = 30
36 - 6 = 30
48 - 17 = 31
9 - 8 = 1
6 - 6 = 0
86 - 63 = 23
15 - 14 = 1
49 - 28 = 21
5 × 6 = 30
30 × 1 = 30