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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 5: e) X x`7/9` = `2/3 + `5/4` g) X – `7/9` =`2/3` : `6/5` h) `1/4` +`9/8` : X =`1/2` i)`5/7` + X :`9/4` = `4/3`

Tháng Sáu 18, 2022 Toán học 2 Comments 0 views

Toán Lớp 5: e) X x7/9 = 2/3 + 5/4
g) X – 7/9 =2/3 : 6/5
h) 1/4 +9/8 : X =1/2
i)5/7 + X :9/4 = 4/3

Comments ( 2 )

  1. truongthanhhung
    truongthanhhung
    18 Tháng Sáu, 2022 at 4:07 sáng
    Reply
    Lời giải và giải thích chi tiết:
    e)
    x × 7/9 = 2/3 + 5/4
    x × 7/9 = 13/6
    x = 13/6 : 7/9 = 39/14
    g)
    x – 7/9 = 2/3 : 6/5
    x – 7/9 = 5/9
    x = 12/9
    x = 4/3
    h)
    1/4 + 9/8 : x = 1/2
    9/8 : x = 1/4
    x = 9/8 : 1/4 = 9/2
    i)
    5/7 + x : 9/4 = 4/3
    x : 9/4 = 4/3 – 5/7 = 13/21
    x = 13/21 × 9/4 = 117/84

  2. cattien
    cattien
    18 Tháng Sáu, 2022 at 4:06 sáng
    Reply
                  #Fan Elaina
    e, x × $\frac{7}{9}$ =$\frac{2}{3}$ + $\frac{5}{4}$ 
        x × $\frac{7}{9}$ =$\frac{23}{12}$
        x =$\frac{23}{12}$ : $\frac{7}{9}$ 
        x = $\frac{69}{28}$ 
     ———-
    g, x – $\frac{7}{9}$ = $\frac{2}{3}$ : $\frac{6}{5}$
        x – $\frac{7}{9}$ = $\frac{5}{9}$
        x = $\frac{5}{9}$ + $\frac{7}{9}$
        x = $\frac{4}{3}$ 
    ———-
    h, $\frac{1}{4}$ + $\frac{9}{8}$ : x = $\frac{1}{2}$
        $\frac{9}{8}$ : x = $\frac{1}{2}$ – $\frac{1}{4}$
        $\frac{9}{8}$ : x = $\frac{1}{4}$
        x = $\frac{9}{8}$ : $\frac{1}{4}$
        x = $\frac{9}{2}$
    ———-
    i, $\frac{5}{7}$ + x : $\frac{9}{4}$ = $\frac{4}{3}$ 
       x : $\frac{9}{4}$ = $\frac{4}{3}$ – $\frac{5}{7}$ 
       x : $\frac{9}{4}$ = $\frac{13}{21}$ 
       x = $\frac{13}{21}$ . $\frac{9}{4}$ 
       x = $\frac{39}{28}$ 

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222-9+11+12:2*14+14 = ? ( )

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