www.qcfz.net > 31点5×5点6 3十一点5×3点4 3十一点五简算

31点5×5点6 3十一点5×3点4 3十一点五简算

原式 =31.5x5.6+31.5x3.4+31.5 =31.5x(5.6+3.4+1) =31.5x(9+1) =31.5x10 =315

31.5×4/25 =63/2×4/25 =126/25

首先将6/5和9/5先加起来,等於15/5,即3,然後再乘以3.3,答案就是9.9

31点8+2点4×1点五 =31.8+2.4x5x0.3 =31.8+12x0.3 =31.8+3.6 =35.4

31.4X3.14/2=49.298

如图

解:依题意得算式, 31.5×4÷(6+3) =126÷9 =14 即315×4÷(6+3)=14

12.5+7.5×3 =12.5+22.5 =35 (0.4+8)×2.5 =0.4×2.5+8×2.5 =1+20 =21 31.5×27-1.5×27 =(31.5-1.5)×27 =30×27 =810

3.04x31.2/1.98/31.2x1.98 =3.04x31.2x1.98/1.98/31.2 =3.04x31.2/31.2 =3.04 得到的结果为3.04

1.5x(10.03-15.6÷7.5) =1.5x10+1.5x0.03-15.6x1.5÷(5X1.5) =15+0.045-15.6÷5 =15.045-15÷5-0.6÷5 =15.045-3-0.12 =12.045-0.12 =11.925

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