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

Toán Lớp 5: tính nhanh 62 x 8 -31 x 14 +31 x48

Tháng Sáu 13, 2022 Toán học 2 Comments 0 views

Toán Lớp 5: tính nhanh 62 x 8 -31 x 14 +31 x48

Comments ( 2 )

  1. thuminhthong
    thuminhthong
    13 Tháng Sáu, 2022 at 1:32 sáng
    Reply
    62 xx 8 -31 xx 14 +31xx48
    =31xx2xx8-31xx14+31xx48
    =31xx16-31xx14+31xx48
    =31xx(16-14-48)
    =31xx50
    =31xx5xx10
    =155xx10
    =1550
     

  2. quynhmaithu
    quynhmaithu
    13 Tháng Sáu, 2022 at 1:32 sáng
    Reply
    $\text{62$\times$8-31$\times$14+31$\times$48}$
    $\text{= 31$\times$2$\times$8-31$\times$14+31$\times$48}$
    $\text{= 31$\times$(2$\times$8)-31$\times$14+31$\times$48}$
    $\text{= 31$\times$16-31$\times$14+31$\times$48}$
    $\text{= 31$\times$(16-14+48)}$
    $\text{= 31$\times$(2+48)}$
    $\text{= 31$\times$50}$
    $\text{= 31$\times$5$\times$10}$
    $\text{= (31$\times$5)$\times$10}$
    $\text{= 155$\times$10}$
    $\text{= 1550}$
    $#Bin$ 

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

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