1/14×17.6+36÷4/5+2.64×12.5简便运算

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/25 10:48:55
1/14×17.6+36÷4/5+2.64×12.5简便运算1/14×17.6+36÷4/5+2.64×12.5简便运算1/14×17.6+36÷4/5+2.64×12.5简便运算题目错了,应该是1又

1/14×17.6+36÷4/5+2.64×12.5简便运算
1/14×17.6+36÷4/5+2.64×12.5简便运算

1/14×17.6+36÷4/5+2.64×12.5简便运算
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
=100

1又1/4×17.6+36÷4/5+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
=100

(2.5-2.5*0.6)/0.4 =(2.5*1-2.5*0.6)/0.4 =2.5*(1-0+0.61*14=1.5+0.61*14=10.04 2000/12.5/25/0.8=2000/(12.5