0.4×0.08×0.2×12.5×0.25×0.5简便脱式怎么写
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①42÷(5.25÷0.25) =42÷(5.25×4) =42÷21 =2 ②0.4+12.6÷0.28×0.2 =0.4+45×0.2 =0.4+9 =9.4 ③8.4-8.4×1.5÷1.8 =8.4×(1- 5 6 ) =8.4× 1 6 =1.4 ④0.27×99+0.27 =0.27×(99+1) =0.27×100 =27 ⑤2.5×3.2×0.125 =2.5×(0.4×8)×0.125 =(2.5×0.4)×(8×0.125) =1×1 =1 ⑥13.5÷2.5÷0.125÷0.4÷8 =13.5÷(2.5×0.125×0.4×8) =13.5÷[(2.5×0.4)×(0.125×8)] =13.5÷[1×1] =13.5÷1 =13.5.
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