www.qcfz.net > 12.5*(8+0.08)*2

12.5*(8+0.08)*2

(8+0.08)*12.5脱式计算 =8x12.5+0.08x12.5 =100+1 =101

=0.8×12.5×0.08 =10× 0.08 =0.8

(0.8+0.08)乘以12.5 =(0.8+0.08)*12.5 =0.8*12.5+0.08

0.8×0.25×0.4×12.5的简便运算写法如下: 8x0.25x0.4x12.5 =(8x12

12.5*0.8*2.5*4 =10*10 =100

小题1:D小题1:C小题1:C 小题1:本题考查区时计算,西五区区时较东八区晚13个

(1)总人数=100+200+700+600+300+100=2000(人);(2)分数分别为:5、

27 解:   12.5×2.7×0.8   =(12.5×0.8)×2.7   =10×2.7  

0.8x=10 x=10÷0.8=12.5

这个题有点莫名其妙.看不懂!

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