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5.2减括号6% 2.4除以6括号等于多少

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

28/55 解析: (3/5-2/15)÷(1/12+5/6) =(7/15)÷(11/12) =(7/5)÷(11/4) =28/55

5/6减去括号,1/12加上2/15括回 化为数学式子即为5/6-(1/12+2/15) =50/60-(5/60+8/60) =50/60-13/60 =37/60

5/16 ×[(2/5+2/3)÷5/6] = 5/16 ×[16/15×6/5] =5/16 ×16/15×6/5 =2/5

是1/6(5-2/3)吗?

(3/4-1/8)×(5/6+2/3) =(6/8-1/8)×(5/6+4/6) =5/8×10/6 =25/24 =1又1/24

〈(1。8-0。6)/口+2。5〉x0。4 = 3。4 〈1。2/口+2。5〉x0。4 = 3。4 0。48/口+1 = 3。4 0。48/口 = 2。4 口 = 0。48/2。4 = 0。2

-11/2×(1/3-1/2)×0.6÷1.75=-11/2×-1/6×3/5×5/7=11/12×3/7=11/28

1/6*2/5÷(5/6-3/4) =1/6*2/5÷1/12 =1/6*2/5*12 =4/5

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