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

Toán Lớp 5: 45,25 + 18,7 + 37,75 + 24,3 142,82 – 25,63 + 74,18 49 – ( 12,5 + 17,6 )

Toán Lớp 5: 45,25 + 18,7 + 37,75 + 24,3
142,82 – 25,63 + 74,18
49 – ( 12,5 + 17,6 )

Comments ( 2 )

  1. $\textit{a) 45,25 + 18,7 + 37,75 + 24,3}$
    $\textit{= ( 45,25 + 37,75 ) + ( 18,7 + 24,3 )}$
    $\textit{= 83 + 43}$
    $\textit{= 126}$
    $\textit{b) 142,82 – 25,63 + 74,18}$
    $\textit{= ( 142,82 + 74,18 ) – 25,63}$
    $\textit{= 217 – 25,63}$
    $\textit{= 191,37}$
    $\textit{c) 49 – ( 12,5 + 17,6 )}$
    $\textit{= 49 – 30,1}$
    $\textit{= 18,9}$

  2. a,      45,25 + 18,7 + 37,75 + 24,3  
    = ( 45,25 + 37,75) + ( 18,7 + 24,3)
    =        83              +     43
    =           126
      b,  142,82 – 25,63 + 74,18
    = (142,82 + 74,18) – 25,63
    =  217   – 25,63
    =   191,37
     
      c,    49 – ( 12,5 + 17,6)
    = 49  –  30,1
    = 18,9
    Chúc bạn học tốt 😀

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

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