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0.8除以1.25脱式计算

0.8÷1.25 =80÷125 =16/25

39×1.25+ 0.8 =(40-1)x1.25+0.8 =40x1.25-1x1.25+0.8 =50-1.25+0.8 =50-1-0.25+0.8 =49+0.8-0.25 =49+0.55 =49.55 谢谢,请采纳

(1)1.25×(80+0.8),=1.25×80+1.25×0.8,=100+1,=101;(2)4.2×7.8+2.2×4.2,=4.2×(7.8+2.2),=4.2×10,=42;(3)4×6.33×0.5,=2×6.33,=12.66;(4)20.9+10.5÷(5.2-3.7),=20.9+10.5÷1.5,=20.9+7,=27.9;(5)21÷0.25÷0.4,=21÷...

3.25除以12.5除以0.8的脱式计算 3.25除以12.5除以0.8 =3.25÷(12.5*0.8) =3.25÷10 =0.325

4.2×(1.25乘以0.8) =4.2x(1.25x0.8) =4.2x1 =4.2

括号里的20-1点二五×0点八括起来除以一点九脱式计算 解: (20-1.25×0.8)÷1.9 =(20-1)÷1.9 =19÷1.9 =10

0.8×1.2÷0.8×1.2 =(0.8÷0.8)×(1.2×1.2) =1×1.44 =1.44

1.25x0.7x0.8 =1.25x0.8x0.7 =1x0.7 =0.7

1.25x9.97x0.8 =1.25x0.8x9.97 =1x9.97 =9.97

解:21.36÷0.8-12.9=26.7-12.9=13.8

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