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3.5X[13%(3.12+5.28)]

3.5X[13-(3.12+5.28)]=3.5x(13-8.4)=3.5x4.6=16.1 再看看别人怎么说的.

简便3.5*【13-(3.12%5.28)】3.5*【13-(3.12+5.28)】=3.5*(13-8.4)=3.5*4.6=16.1

0.8x[13-(3.12+5.28)]=0.8x[13-8.4]=0.8x4.6=4/5*23/5=92/25 如果帮到你,请记得采纳,o(∩_∩)o谢谢

3.5*[13-(3.12+5.28)]=3.5*[13-8.4]=3.5*4.6=7*2.3=16.1

0.8x13-3.12 +5.28=10.4-3.12 +5.28=10.4+(5.28-3.12)=10.4+2.16=12.56

0.8x{13-(3.12+5.28)}; =0.8x{13-3.12-5.28}; =0.8x4.6; =3.68

11.5÷【13-(3.12+ 5.28)】=11.5÷【13-8.4】=11.5÷4.6=2.5此题没有合适的简便方法

0.8*13-3.12+5.28=10.4-3.12+5.28=12,56

0.8x【13-(3.12+5.28)】=0.8*(13-8.4)=3.68100.1x101-100.1 =100.1*(101-1)=10010 (455-12.5x4)/8.1=(455-500)/8.1=-45/8.1=-50/9

0.8*(13-8.4) =0.8*4.6 =0.8*(4+0.6) =0.8*4+0.8*0.6 =3.2+0.48 =3.68

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