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1.2 0.25 1.3x4简便计算

你好!2x4+1.3x4=11.2/0.25+1.3x4=(1.2+1.3)x4=2打字不易,采纳哦!

1.2÷.25*1.3*4 =1.2*1.3*1/4*4 =1.2*1.3*1 =1.56

1.2÷0.25+1.3x4=1.2÷1/4+1.3x4=1.2X4+1.3x4=4x(1.2+1.3)=4x2.5=10

解:(1) 当X为乘号时,(1.2十0.25)X4=4.8+1=5.8(2)当X不为乘号时,(1.2十0.25)X4=4.8X+X=5.8X

1.2/0.25+1.3*4=1.2*4+1.3*4=(1.2+1.3)*4=10

1.2÷0.25+1.3*4=1.2*4+1.3*4=(1.2+1.3)*4=2.5*4=10

1.2/0.25=1.2*4/(0.25*4)=4.8

=1.2*4+1.2*4=1.2*8=9.6

1.2*0.25=4*0.3*0.25=4*0.25*0.3=1*0.3=0.3

1.2*0.25=0.3*4*0.25=0.3*1=0.3

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