30 乘法 9 等于多少?
30 × 9 = 270
30乘法9 等于 270
竖式演算
验算
- 用除法验算:270 ÷ 9 = 30
- 用除法验算:270 ÷ 30 = 9
相关题目
30 × 8 = 240
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