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21x100的竖式计算

21 * 2.84 = 59.64 竖式见图:

21*12=252竖式计算见图

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30乘以21等于.630.一三得323得六,然后把零挪下来.答案是630.

而这一成13的竖式计算,怎么列?21*10式计算

21乘23竖式计算 21*23 =483 验算 483÷21 =23

21 * 109 = 2289

59.64

21*108=2268,答案来源1*108=1百082十*108=2160

21x24的竖式:21x24=504

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