Question

4.2×0.35+0.42×7.5-0.042×10怎么简便运算？

Answer 1

4.2×0.35+0.42×7.5-0.042×10的简便运算：
4.2×0.35+0.42×7.5-0.042×10
=4.2×0.35+4.2×0.75-4.2×0.10
=4.2×（0.35+0.75-0.10）
=4.2×（1.10-0.10）
=4.2×1
=4.2

Answer 2

4.2×0.35+0.42×7.5-0.042×10
=4.2×0.35+4.2×0.75-4.2×0.1
=4.2x(0.35+0.75-0.1)
=4.2x1
=4.2

Answer 3

4.2x0.35+0.42x7.5-0.042x10
=4.2x0.35+0.42x10x0.75-0.042x100x0.1
=4.2x0.35+4.2x0.75-4.2x0.1
=4.2x（0.35+0.75-0.1）
=4.2x（1.1-0.1）
=4.2x1
=4.2

Answer 4

简便计算为
4.2*0.35+0.42*7.5-0.042*10
=0.42*3.5+0.42*7.5-0.42*1
=0.42*（3.5+7.5-1）
=0.42*10
=4.2

Answer 5

4.2*0.25+0.42*3.5+0.042*35的简便运算是:=4.2*0.35+4.2*0.75-42.01=4.2*(0.35+0.75-0.1)=4.2*1=42