70 减法 42 等于多少？
70 - 42 = 28
70减法42 等于 28
竖式演算
验算
- 用加法验算：28 + 42 = 70
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70 - 41 = 29
70 - 43 = 27
70 - 40 = 30
70 - 44 = 26
70 - 39 = 31
70 - 45 = 25
70 - 38 = 32
70 - 46 = 24
69 - 42 = 27
71 - 42 = 29
72 - 42 = 30
68 - 42 = 26
73 - 42 = 31
67 - 42 = 25
74 - 42 = 32
66 - 42 = 24
29 - 1 = 28
30 - 2 = 28
31 - 3 = 28
32 - 4 = 28
33 - 5 = 28
34 - 6 = 28
76 - 67 = 9
65 - 59 = 6
20 - 12 = 8
90 - 89 = 1
71 - 38 = 33
85 - 36 = 49
3 + 25 = 28
1 × 28 = 28