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简便运算:一点五乘六又十二分之五加一又二分之一乘...

简便运算: 1.5×6又5/12+1又1/2×7/12-150% =1.5×(6又5/12+7/12-1) =1.5×6 =9

2-1/2-1又1/2×0.5+5.6 =2-0.5-0.75+5.6 =6.35

+16又5/6 + (-23又1/6) =16又5/6 - 23又1/6 =16+ 5/6 - (23+ 1/6) =16 +5/6 - 23- 1/6 =(16-23)+(5/6 - 1/6) = -7 + 2/3 =-19/3 =-8又1/3

17分之5×8分之3+15分之1×16分之7+15分之1×3又2分之1 =17分之5×8分之3+15分之7×16分之1+15分之7×2分之1 =17分之5×8分之3+15分之7×(16分之1+2分之1) =17分之5×8分之3+15分之7×16分之9 =17分之5×8分之3+5分之7×16分之3 =17分之5×8分之3+10分之7×8...

一又二分之一加二又六分之一加三又十二分之一加四又二十分之一加……加十又一百一十分之一 =(1+2+3+4+……+10)+(1/2+1/6+1/12+1/20+……+1/110) =(1+10)×10÷2+[(1-1/2)+(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+……+(1/10-1/11)] =55+[1-1/2+1/2-1/3+1/3-1/...

十二又十一分之五加负十一又十一分之六的绝对值减括号兵五加二又二分之一的绝对值 12又5/11+|-11又6/11|-|(5+2又1/2)| =(12又5/11+11又6/11)-7.5 =24-7.5 =16.5

一百二十乘七又五分之三加一百一十一除以二十四分之五加十点二乘七十六 =120×7.6+111×4.8+10.2×76 =120×7.6+102×7.6+111×4.8 =(120+102)×7.6+111×4.8 =222×7.6+111×4.8 =111×7.6×2+111×4.8 =111×(15.2+4.8) =111×20 =2220

五又二分之一加五点五乘二又六分之五加六分之一除以十一分之二 =11/2+11/2×2又5/6+1/6×11/2 =11/2×(1+2又5/6+1/6) =11/2×4 =22

(1又1/2)-(5/6)+(7/12)-(9/20)+(11/30)-(13/42)+15/56 =(1+1/2)-[(1/2)+(1/3)]+[(1/3)+(1/4)]-[(1/4)+(1/5)]+[(1/5)+(1/6)]-[(1/6)+(1/7)]+【1/7+1/8】 =1+1/2-1/2-1/3+1/3+1/4-1/4-1/5+1/5+1/6-1/6-1/7+1/7+1/8 =1+1/8 =1又1/8 =6/7

二又1/6-2点86×括号6.25减六又四分之一括号完 (2+1/6)-2.86×[6.25-(6+1/4)] =(2+1/6)-2.86×0 =(2+1/6)-0 =2+1/6. 等于二又六分之一.

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