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

Toán Lớp 2: Tinh nhanh 34-21+16+51+10 53-24+44-13+20

Toán Lớp 2: Tinh nhanh
34-21+16+51+10
53-24+44-13+20

Comments ( 2 )

  1. 34-21+16+51+10
    =(34+16)+(51-21)+10
    =50+30+10
    =90
    53-24+44-13+20
    =(53-13)+(44-24)+20
    =40+20+20
    =80
     

  2. Giải đáp:
    34 – 21 + 16 + 51 + 10
    = ( 34 + 16 ) + (51 – 21) + 10
    = 50 + 30 + 10
    = 90
    53 – 24 + 44 – 13 + 20
    = ( 53 – 13 ) + ( 44 – 24 ) + 20
    = 40 + 20 + 20 = 80
     

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