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

Toán Lớp 5: Viết thành số thập phân a) 2/5 b 3/4 c) 1 3/5 c) 2 1/4

Toán Lớp 5: Viết thành số thập phân a) 2/5 b 3/4 c) 1 3/5 c) 2 1/4

Comments ( 2 )

  1. $\text{a)}$ $\dfrac{2}{5}$ = $\dfrac{4}{10}$ = $\text{0,4}$
    $\text{b)}$ $\dfrac{3}{4}$ = $\dfrac{75}{100}$ = $\text{0,75}$
    $\text{c)}$ $\text{1}$$\dfrac{3}{5}$ = $\dfrac{8}{5}$ = $\dfrac{16}{10}$ = $\text{1,6}$
    $\text{d)}$ $\text{2}$$\dfrac{1}{4}$ = $\dfrac{9}{4}$ = $\dfrac{225}{100}$ = $\text{2,25}$
     

  2. a) $\frac{2}{5}$ = 2 : 5 = 0,4
    b) $\frac{3}{4}$ = 3 : 4 = 0,75
    c) 1$\frac{3}{5}$ = $\frac{8}{5}$ = 8 : 5 = 1,6
    d) 2$\frac{1}{4}$ = $\frac{9}{4}$ = 9 : 4 = 2,25
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222-9+11+12:2*14+14 = ? ( )

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