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2.5 3.6 0.9

2.5*3.6*0.9的脱试计算2.5*3.6*0.9=2.5*4*(0.9*0.9)=10*0.81=8.1

2.5乘3.6除以0.9的脱式计算2.5*3.6÷0.9=2.5*(3.6÷0.9)=2.5*4=10

3.6*0.9*2.5=4*0.9*0.9*2.5=(4*2.5)*0.9*0.9=10*0.81=8.1

2.5乘以4乘以0.9等于10乘以0.9等于9

3.6*2.5=9*0.4*2.5=9*1=9

2.5x3.6=2.5x4x0.9=10x0.9=9

①2.5*3.6*0.9 =2.5*4*0.9*0.9=10*0.81=8.1 ②12.5*0.3*8.8 =12.5*8*0.3*1.1=100*0.33=33 ③1.25*(100-8)=1.25*100-1.25*8=125-10=115 ④2.61*4.5+2.61*6.5-2.61=2.61*(4.5+6.5-1)=2.61*10=26.1 ⑤3.4*1.01 =3.4*(1+0.01)=3.4+0.034=3.434 ⑥6.5*1.98=6.5*(2-0.02)=6.5*2-6.5*0.02=13-0.13 =12.87

①2.5*3.6*0.9 =2.5*4*0.9*0.9=10*0.81=8.1②12.5*0.3*8.8 =12.5*8*0.3*1.1=100*0.33=33③1.25*(100-8)=1.25*100-1.25*8=125-10=115④2.61*4.5+2.61*6.5-2.61=2.61*(4.5+6.5-1)=2.61*10=26.1 ⑤3.4*1.01 =3.4*(1+0.01)=3.4+0.034=3.434 ⑥6.5*1.98=6.5*(2-0.02)=6.5*2-6.5*0.02=13-0.13=12.87

=2.5x4x0.9=10x0.9=9

2.5乘3.6 =0.9乘(4乘2.5)=0.9乘10=9

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