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

Toán Lớp 6: tính nhanh a,4×33 + 4 x 67 + 4.25 b,23×16+23.84+300 c,66×53+66×14+33×66

Toán Lớp 6: tính nhanh
a,4×33 + 4 x 67 + 4.25
b,23×16+23.84+300
c,66×53+66×14+33×66

Comments ( 2 )

  1. Lời giải và giải thích chi tiết:
    $\text{a, 4×33+4×67+4×25}$
    $\text{= 4×(33+67+25)}$
    $\text{= 4×125}$
    $\text{= 500}$
    $\text{b, 23×16+23×84+300}$
    $\text{= 23×(16+84)+300}$
    $\text{= 23×100+300}$
    $\text{= 2300+300}$
    $\text{= 2600}$
    $\text{c, 66×53+66×14+33×66}$
    $\text{= 66×(53+14+33)}$
    $\text{= 66×100}$
    $\text{= 6600}$

  2. a, 4 . 33 + 4 . 67 + 4 . 25
    = 4 . ( 33 + 67 + 25 )
    = 4 . 125
    = 500
    b, 23 . 16 + 23 . 84+300
    = 23 . ( 16 + 84 ) + 300
    = 23 . 100 + 300
    = 2300 + 300 
    = 2600
    c, 66 . 53+ 66 . 14 + 33 . 66
    = 66 . ( 53 + 14 + 33 )
    = 66 . 100
    = 6600
                     @changg

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