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0.8×(12.5+1.25)的简便计算

0.8*(12.5-1.25) =0.8*12.5-0.8*1.25 =10-1 =9

0.8✘1.25+0.8✘12.5

0.8x(1.25+12.5) =0.8x1.25+0.8x12.5 =1+10 =11

0.8×(12.5-1.25) =0.8×12.5-0.8×1.25 =10-1 =9

=0.1+10+1 =11.1

12.5*8+1.25*8+0.125*8

(12.5+1.25)×0.8简便计算 (12.5+1.25)×0.8 =12.5×0.8+1.25×0.8 =1+1 =2

原式=12.5*8+1.25*8 = 100+10 =110

(1.25+12.5)×0.8 =1.25×0.8+12.5×0.8 =1+10 =11 (28-1.5×8)÷0.2 =(28-12)÷1/5 =16×5 =80

(1.25+12.5+0.125)×8 =1.25×8+12.5×8+0.125×8 =10+100+1 =111。满意请采纳。

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