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计算下面各题能简算的要简算 5/6-1/2+1/4 5/12+3/4...

5/6-1/2+1/4 =5/6-1/4 =10/12-3/12; =7/12; 5/12+3/4-5/8 =10/24+18/24-15/24 =13/24; 4/5-(3/10+1/6) =24/30-9/30-5/30 =10/30 =1/3; 5/9+7/18+4/9 =(5/9+4/9)+7/18 =1+7/18 =25/18; 1-2/7-5/7 =1-(2/7+5/7) =1-1 =0 2/3+5/13+1/3 =1+5/13 =1...

6/5-2/1+3/1 5/6-1/2+1/3 =(5-3+2)/6 =4/6 =2/3 =3分之2

1/2+4/7+3/7 =1/2+1 =1又1/2 1/9+(1/6+2/9)+5/6 =(1/9+2/9)+(1/6+5/6) =1/3+1 =1又1/3 苹果数减去3后是4和6的公倍数。4、6的最小公倍数是24 所以苹果数最少是24+3=27(个)

① 5 8 + 5 6 + 3 8 + 1 6 ,=( 5 8 + 3 8 )+( 5 6 + 1 6 ),=1+1,=2;②4- 12 17 - 5 12 ,=3 5 17 - 5 12 ,=3 60 204 - 85 204 ,=2 179 204 ,③1 4 9 - 7 13 +3 7 9 - 6 13 ,=1 4 9 +3 7 9 -( 7 13 + 6 13 ),=5 2 9 -1,=4 2 9 .

5-5/11-6/11 =5-(5/11+6/11) =5-1 =4 5/14+3/4+9/14+1/4 =(5/14+9/14)+(3/4+1/4) =1+1 =2

ADS为额额为全文

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5/6-4/9+1/6-2/9 =(5/6+1/6)-(4/9+2/9) =1-6/9 =3/9 =1/3

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