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489乘7约等于多少

更新时间: 2020-10-03 00:00:00     

使用不同的近似方法,结果不同。几种近似方法如下:

1、使用四舍五入法,近似至十位上:由于489乘以7,等于3423,所以近似值为3420;

2、使用四舍五入法,近似至百位上:近似结果为3400;

3、使用四舍五入法,近似至千位上:近似结果为3000;

4、先近似乘数,再计算结果:因为489约等于500,所以“489乘以7”约等于“500乘以7”,近似结果为3500。

关键词: 等于 多少

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