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

Toán Lớp 6: Tìm y: a) `-3/5` . `y` = `21/10` b) `y` : `3/8` = `-1“31/33`

Toán Lớp 6: Tìm y:
a) -3/5 . y = 21/10
b) y : 3/8 = -131/33

Comments ( 2 )

  1. -3/5 . y = 21/10
              y = 21/10 : – 3/ 5
              y = 21/10 . 5/3
              y = 105/30
              y = 7/2
    y : 3/8 = – 1 31/33
    y : 3/8 = – 64/33
            y = – 64/33 . 3/8
            y = – 8/11  

  2. Bài làm :
    a) $-\frac{3}{5}$ .y = $\frac{21}{10}$ 
                             y =$\frac{21}{10}$  : $-\frac{3}{5}$
                             y = $\frac{1}{3}$ 
    b) y : $\frac{3}{8}$ = $-1\frac{31}{33}$ 
        y : $\frac{3}{8}$ = $-\frac{64}{33}$ 
        y                          = $-\frac{64}{33}$ . $\frac{3}{8}$
        y                          = $-\frac{8}{11}$ 
     

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