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0.25x1.38x4用脱式计算该怎么算?

0.25x1.38x4 =(0.25x4)x1.38 =1x1.38 =1.38

解:原式=508-120×4-3×4 =508-480-12 =28-12 =16

计算步骤: =34.8乘以(0.25乘以4) =34.8乘以1 =34.8

0

2.5x45x0.4 =2.5x0.4x45 =1x45 =45

11÷0.25+19÷0.25 =11x4+19x4 =(11+19)x4 =30x4 =120

5.73x4.27+5.73x5.73 =5.73x(4.27+5.73) =5.73x10 =57.3

如图

8.9x1.1x4.7的脱式计算 8.9x1.1x4.7 =9.79×4.7 =46.013

2.25÷0.25x4 =5x4 =20

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