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

Toán Lớp 4: Tính bằng hai cách : a,( 32275+1980) :5. B , (1008- 432) : 9

Toán Lớp 4: Tính bằng hai cách : a,( 32275+1980) :5. B , (1008- 432) : 9

Comments ( 2 )

  1. a ] [ 32 275 + 1980 ] : 5
    C1 = 34255 : 5 = 6851
    C2 = 32 275 : 5 + 1980 : 5 = 6455 + 396 = 6851
    b ] [ 1008 – 432 ] : 9
    C1 = 576 : 9 = 64
    C2 = 1008 : 9 – 432 : 9 = 112 – 48 = 64
     

  2. a) Cách 1 : ( 32275 + 1980 ) : 5 = 34255 : 5 = 6851
        Cách 2 : ( 32275 + 1980 ) : 5 = 32275 : 5 + 1980 : 5 = 6455 + 396 = 6815
    b) Cách 1 : ( 1008 – 432 ) : 9 = 576 : 9 = 64
        Cách 2 : ( 1008 – 432 ) : 9 = 1008 : 9 – 432 : 9 = 112 – 48 = 64

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