Question

小学数学一、 0.125×2又3/4+1/8×4.25+12.5% 怎么简便算二、3/4x-x%·5=17.5 怎么解三

Answer 1

一.0.125*2又3/4+1/8*4.25+12.5%

=1/8*2.25+1/8*4.25+12.5%

=1/8*（2.25+4.25）+12.5%

=1/8*7+1/8

=1

二.3/4X-X%*5=17.5

15/20X-1/20X=17.5

14/20X=17.5

X=17.5*20/14

三.1又3/5÷（X-0.45)=3又1/5

8/5÷16/5=x-0.45

2=x-0.45

x=2.45