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

Toán Lớp 5: Tính : b, ( 1-1/2) x ( 1-1/3) x ( 1-1/4) x ( 1-1/5 )

Toán Lớp 5: Tính :
b, ( 1-1/2) x ( 1-1/3) x ( 1-1/4) x ( 1-1/5 )

Comments ( 2 )

  1. Giải đáp: 
    ( 1 – $\frac{1}{2}$ ) x ( 1 – $\frac{1}{3}$ ) x ( 1 – $\frac{1}{4}$ ) x ( 1 – $\frac{1}{5}$ )
    = ( $\frac{2}{2}$ – $\frac{1}{2}$ ) x ( $\frac{3}{3}$ – $\frac{1}{3}$ ) x ( $\frac{4}{4}$ – $\frac{1}{4}$ ) x ( $\frac{5}{5}$ – $\frac{1}{5}$ )
    = $\frac{1}{2}$ x $\frac{2}{3}$ x $\frac{3}{4}$ x $\frac{4}{5}$
    = $\frac{1}{5}$
    CHÚC BẠN HỌC TỐT
    Cho mk xin ctlhn ạ
     

  2. b) ( 1 – 1/2) xx ( 1 – 1/3) xx ( 1 – 1/4) xx ( 1 – 1/5)
    = 1/2 xx 2/3 xx 3/4 xx 4/5
    = (1xx2xx3xx4)/(2xx3xx4xx5)
    = (1xx1xx1xx1)/(1xx1xx1xx5)
    = 1/5

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