1/14×17.6+36÷4/5+2.64×12.5简便运算
问题描述:
1/14×17.6+36÷4/5+2.64×12.5简便运算
答
题目错了,应该是1又4分之1吧,否则无法简便.
解法如下:
1又1/4×17.6+36÷4/5+2.64×12.5
=(5/4)×17.6+36*(5/4)+2.64×12.5
=1.25×17.6+36*1.25+26.4×1.25
=1.25*(17.6+36+26.4)
=1.25*80
=100112×(24-4又4/5)÷2.469又3/7÷18112×(24-4又4/5)÷2.4=112×(24-24/5)÷2.4=112×24×(1-1/5)÷2.4=112×10×4/5=112×8=89669又3/7÷18=486/7÷18=27/7【486÷18=27,约掉】