12.5乘0.56+1.4除于5分之2+7.5乘15+17乘2.5=?注意:是简便运算!

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12.5乘0.56+1.4除于5分之2+7.5乘15+17乘2.5=?注意:是简便运算!
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12.5乘0.56+1.4除于5分之2+7.5乘15+17乘2.5=?注意:是简便运算!
12.5乘0.56+1.4除于5分之2+7.5乘15+17乘2.5=?
注意:是简便运算!

12.5乘0.56+1.4除于5分之2+7.5乘15+17乘2.5=?注意:是简便运算!
12.5*0.56+1.4/(5/2)+7.5*15+17*2.5
=2.5*5*0.56+2.5*1.4+2.5*3*15+2.5*17
=2.5*(5*0.56+1.4+3*15+17)
=2.5*66.2
=165.5
我确定!

12.5*0.56+1.4/(5/2)+7.5*15+17*2.5
=2.5*5*0.56+2.5*1.4+2.5*3*15+2.5*17
=2.5*(5*0.56+1.4+3*15+17)
=2.5*62.1
=155.25

2.5*8*5*0.7+1.4*2.5+2.5*45+17*2.5
=2.5*(28+45+17)+0.5*5*1.4
=2.5*80+0.5*7
=200+3.5
=203.5

12.5*0.56+1.4/(2/5)+7.5*15+17*2.5
=12.5*0.56+1.4*2.5+7.5*15+17*2.5
=2.5*(5*0.56)+2.5*1.4+2.5*(3*15)+2.5*17
=2.5*(2.8+1.4+45+17)
=2.5*66.2
=2.5*(64+2.2)
=2.5*64+2.5*2.2
=2.5*4*16+2.5*2*1.1
=10*16+5*1.1
=160+5.5=165.5