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6/7+1/4-1/6脱式计算

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7/9-(1/6+4/9) =7/9-4/9-1/6 =3/7-1/6 =(18一7)/42 =11/42

1/4+1/6-1/8 =6/24+4/24-3/24 =7/24

1/6+1/3+1/2 =1/6+2/6+3/6 =1 8/15+(7/30-1/5) =16/30+7/30-6/30 =17/30 6/7-(1/7+1/2) =6/7-1/7-1/2 =12/14-2/14-7/14 =2/14 9/10-(1/4-1/6) =9/10-1/4+1/6 =54/60-15/60+10/60 =49/60

6/7-(1/6-1/12) =6/7-(2/12-1/12) =6/7-1/12 =72/84-7/84 =65/84

(3/4+1/6)*2/3 =(9/12+2/12)x2/3=11/18 25*1/5-5*1/5 =5-1=4 6/11*7/15*10 =60/15x7/11=28/11 (1/7+1/4)*28 =4+7=11 (21+2/5)*5/7 =15+2/7 39*7/13*2/3=14 60*2/5=12x2=24 4*2/9=8/9 3/10*2/3+1/4=1/5+1/4=9/20 20*2/5-5/8 =8-5/8=6+3/8 2/9...

80/72

①5/6+1/5+7/10-1/2 =(5/6-3/6)+(2/10+7/10) =1/3+9/10 =10/30+27/30 =37/30 ②6/7+1/6-﹙1/6-1/7﹚ =(6/7+1/7)+(1/6-1/6) =1 如果对你有帮助,请采纳。谢谢。 要采纳最先回答的正确答案,是对答题者劳动的尊重。祝进步!!!

24×(1/4+5/6-7/8) =6+20-21 =5

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