Question

43×0.72+2.9×4.3-0.43怎么简算？

Answer 1

43×0.72+2.9×4.3-0.43
=0.43x72+29x0.43 -0.43
=0.43x(72+29-1)
=0.43x100
=43

Answer 2

这里面有一个公因数4.3。只要把4.3提取出来就可以很容易计算这道题了。原等式可以变化为
4.3×10×0.72+2.9×4.3-4.3×0.1
=4.3×（7.2+2.9-0.1）
=4.3×10=43。这里的关键步骤就是在。提取4.3这个公因子。

Answer 3

43x0.72+2.9x4.3-0.43
=43x0.72+0.29x43-43x0.01
=43x(0.72+0.29-0.01)
=43*1
=43

Answer 4

这个直接是，4.3乘以（7.2+2.9-0.1）=4.3乘以10=43

Answer 5

43×0.72+2.9×4.3-0.43
=0.43×（72+29-1）=43