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

Toán Lớp 5: Câu 1: Tính nhanh `2/5` x `2/7` + `5/7` x `2/5` $\dfrac{3}{5}$ x $\dfrac{2}{3}$ + $\dfrac{4}{3}$ x $\dfrac{3}{5}$

Home/ Toán Lớp 5: Câu 1: Tính nhanh `2/5` x `2/7` + `5/7` x `2/5` $\dfrac{3}{5}$ x $\dfrac{2}{3}$ + $\dfrac{4}{3}$ x $\dfrac{3}{5}$

Toán Lớp 5: Câu 1: Tính nhanh `2/5` x `2/7` + `5/7` x `2/5` $\dfrac{3}{5}$ x $\dfrac{2}{3}$ + $\dfrac{4}{3}$ x $\dfrac{3}{5}$

Tháng Ba 4, 2022 Toán học 2 Comments 0 views

Toán Lớp 5: Câu 1: Tính nhanh
2/5 x 2/7 + 5/7 x 2/5
$\dfrac{3}{5}$ x $\dfrac{2}{3}$ + $\dfrac{4}{3}$ x $\dfrac{3}{5}$

Comments ( 2 )

  1. kimnguenoanh
    kimnguenoanh
    4 Tháng Ba, 2022 at 2:05 sáng
    Reply
    $\text{$\dfrac{2}{5}$ × $\dfrac{2}{7}$ + $\dfrac{5}{7}$ × $\dfrac{2}{5}$}$
    $\text{= $\dfrac{2}{5}$ × ( $\dfrac{2}{7}$ + $\dfrac{5}{7}$ )}$
    $\text{= $\dfrac{2}{5}$ × $\dfrac{7}{7}$}$
    $\text{= $\dfrac{2}{5}$}$
    $\text{$\dfrac{3}{5}$ × $\dfrac{2}{3}$ + $\dfrac{4}{3}$ × $\dfrac{3}{5}$}$
    $\text{= $\dfrac{3}{5}$ × ( $\dfrac{2}{3}$ + $\dfrac{4}{3}$ )}$
    $\text{= $\dfrac{3}{5}$ × $\dfrac{6}{3}$}$
    $\text{= $\dfrac{3}{5}$ × 2}$
    $\text{= $\dfrac{6}{5}$}$

  2. cobebongdem
    cobebongdem
    4 Tháng Ba, 2022 at 2:05 sáng
    Reply
    $\text{Giải đáp:}$
    $\text{Câu 1:}$
    $\dfrac{2}{5}$
    $\dfrac{3}{5}$ 
    $\text{Lời giải và giải thích chi tiết:}$
     $\dfrac{2}{5}$ x $\dfrac{2}{7}$ + $\dfrac{5}{7}$ x $\dfrac{2}{5}$
    = $\dfrac{2}{5}$ x ( $\dfrac{2}{7}$ + $\dfrac{5}{7}$ )
    = $\dfrac{2}{5}$ x      $\text{1}$
    =      $\dfrac{2}{5}$
      $\dfrac{3}{5}$ x $\dfrac{2}{3}$ + $\dfrac{3}{5}$ x $\dfrac{4}{3}$
    = $\dfrac{3}{5}$ x ( $\dfrac{2}{3}$ + $\dfrac{4}{3}$ )
    = $\dfrac{3}{5}$ x      $\text{1}$
    = $\dfrac{3}{5}$ 

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

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