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

Toán Lớp 5: Tính: `17/19` `xx` `11/13` `2“5/9` `:` `4“1/2`

Toán Lớp 5: Tính:
17/19 xx 11/13
25/9 : 41/2

Comments ( 2 )

  1. $\text{$\dfrac{17}{19}$ $\times$ $\dfrac{11}{13}$}$ 
    $\text{= $\dfrac{17 \times 11}{19 \times 13}$}$
    $\text{= $\dfrac{187}{247}$}$
    $\text{2$\dfrac{5}{9}$ : 4$\dfrac{1}{2}$}$
    $\text{= $\dfrac{23}{9}$ : $\dfrac{9}{2}$}$
    $\text{= $\dfrac{23}{9}$  $\times$ $\dfrac{2}{9}$}$
    $\text{= $\dfrac{23}{2}$}$

  2. Giải đáp + Lời giải và giải thích chi tiết:
    a)17/19×11/13
    ={17×11}/{19×13}
    =187/247
    b)2 5/9:4 1/2
    =23/9:9/2
    =23/9.{2}/9
    =46/81

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