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6/7+1/4-1/6脱式计算

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7/8-1/4 1/6 =21/24-6/24-4/24 =11/24 ----------------------------------------------------------

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

I/6十1/4=2/12十3/12二5/12

7/9-(1/6+4/9) =7/9-4/9-1/6 =1/3-1/6 =1/6

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

脱式计算:6+1+6 =6x2+1 =12+1 =13

6/7-3/14+5/21 =36/42-9/42+10/42 =1/42×(36-9+10) =1/42 ×37 =37/42

(3/4+1/5)-(5/6-1/2) =(15/20+4/20)-(5/6-3/6) =19/20-1/3 =57/60-20/60 =37/60 行家正解,不明白可以追问!祝您学习进步 满意请点击下面的【选为满意回答】按钮,O(∩_∩)O谢谢

=(3.5+6.5)+1.7×1.7 =10+2.89 =12.89 你好,本题已解答,如果满意,请点右上角“采纳答案”,支持一下。

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