Question

5.6x0.45+0.58×6.5-0.058x10简便方法计算？

Answer 1

解：
5.6×0.45+0.58×6.5-0.058×10
=5.6×0.45+0.58×6.5-0.58×1
=5.6×0.45+0.58×5.5
=0.56×4.5+0.58×5.5
=（0.58-0.02）×4.5+0.58×5.5
=0.58×4.5-0.02×4.5+0.58×5.5
=0.58×（4.5+5.5）-0.02×4.5
=5.8-0.02×4.5
=5.8-0.09
=5.71

Answer 2

5.6×0.45+0.58×6.5-0.058×10
=2.8×2×0.45+0.58×(6.5-1)
=2.8×0.9+0.58×5.5
=2.52+0.29×2×5.5
=2.52+0.29×11
=2.52+0.29×(10+1)
=2.52+2.9+0.29
=5.42+0.29
=5.71

Answer 3

5.6x0.45+0.58x6.5-0.58x1
=5.6x0.45+0.58x（6.5-1）
=（5.5+0.1）x0.45+0.58x5.5
=5.5x（0.45+0.58）+0.045
=5.5x1.03+0.045
=（5+0.5）x1.03+0.045
=5.15+0.515+0.045
=5.15+0.56=5.71

Answer 4

5.6*0.45+0.58*6.5-0.58*1
=5.6*0.45+0.58*(6.5-1)
=5.6*0.45+0.58*5.5
=(5.5+0.1)*0.45+0.58*5.5
=5.5*0.45+5.5*0.58+0.045
=5.5*(0.45+0.58)+0.045
=5.5*1.03+0.045
=5.665+0.045
=5.71