3 乘法 7 等于多少?
3 × 7 = 21
3乘法7 等于 21
竖式演算
验算
- 用除法验算:21 ÷ 7 = 3
- 用除法验算:21 ÷ 3 = 7
相关题目
3 × 6 = 18
3 × 8 = 24
3 × 5 = 15
3 × 9 = 27
3 × 4 = 12
3 × 10 = 30
3 × 11 = 33
3 × 3 = 9
2 × 7 = 14
4 × 7 = 28
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5 × 7 = 35
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23 × 76 = 1748
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86 × 40 = 3440