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(1.25+2.5)×0.8简便计算

(1.25+2.5)×0.8 =1.25x0.8+2x1.25x0.8 =1+2 =3 请采纳正确答案,你们只提问,不采纳正确答案,回答都没有劲!谢谢管理员推荐采纳!! 朋友,请【采纳答案】,您的采纳是我答题的动力,如果没有明白,请追问。谢谢。

(2.5*4+1.25*4)*0.8=15*0.8=12

分配律

原式=1.25x8x2.5+2.5x4x1.25 =25+12.5 =37.5

0.4*1.25*8*2.5=(0.4 x 2.5) x (1.25 x 8) =1 x 10 =10

1.25×2.5×0.8×40 =1.25×0.8×(2.5×40) =1x100 =100

(2.5+1.25)×4 =2.5×4+1.25×4 =10+5 =15

1.25x2.5x0.8x2.5的简便计算 =(1.25x0.8)x(2.5x2.5) =1x6.25 =6.25

0.4×(2.5+1.25) =0.4×2.5+0.4×1.25 =1+0.5 =1.5

(2.5×0.8)×(1.25×4)=20×5=100

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