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

Toán Lớp 5: ( 4/5 x 3/8 + 4/5 x 5/8 – 4/5 x 7/8 ) : 1/2 =

Toán Lớp 5: ( 4/5 x 3/8 + 4/5 x 5/8 – 4/5 x 7/8 ) : 1/2 =

Comments ( 2 )

  1. #kehuydiet
    ( 4/5 xx 3/8 + 4/5 xx 5/8 – 4/5 xx 7/8 ) : 1/2
    = [4/5 xx (3/8+5/8-7/8)]:1/2
    = 4/5 xx 1/8 xx 2
    = 1/5

  2. Giải đáp +Lời giải và giải thích chi tiết:
      (4/5 xx 3/8 + 4/5 xx 5/8 – 4/5 xx 7/8 ) : 1/2
    = [ 4/5 xx (3/8 + 5/8 – 7/8)] : 1/2
    = [ 4/5 xx (3+5-7)/8 ] : 1/2
    = 4/5 xx 1/8 : 1/2
    = (4 xx 1)/(5 xx 8) : 1/2
    = 1/10 : 1/2
    = 1/10 xx 2/1
    = (1 xx 2)/(10 xx 1)
    = 1/5
    = 0,2

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