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

Toán Lớp 4: Bài 4: Tính bằng cách thuận tiện: a) 6120 : 136 + 7480: 136 c) 240000: 80 : 125 ………………………………………. ………………………………………….. …………………………………

Toán Lớp 4: Bài 4: Tính bằng cách thuận tiện:
a) 6120 : 136 + 7480: 136
c) 240000: 80 : 125
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b) 2018 x 68 + 2018 + 34 x 2018 – 3 x 2018
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Comments ( 2 )

  1. a. 6120 : 136 + 7480: 136
    = (6120 + 7480):136
    = 13600 : 136
    = 100
    b. 2018 x 68 + 2018 + 34 x 2018 – 3 x 2018
    = 2018 x (68+1+34-3)
    =2018 x 100
    =201800
    c. 240000: 80 : 125
    = 240000 x $\frac{1}{10000}$ 
    =24

  2. Giải đáp:
    $\text{a/ 100 ; c/ 24 ; b/ 201800.}$
    Lời giải và giải thích chi tiết:
    $\text{a/ 6120 : 136 + 7480 : 136 }$ $\\$ $\text{= (6120 + 7480) : 136}$ $\\$ $\text{= 13600 : 136}$ $\\$ $\text{= 100}$ $\\$ $\text{c/ 240000: 80 : 125}$ $\\$ $\text{= 3000 : 125}$ $\\$ $\text{= 24}$ $\\$ $\text{b/ 2018 x 68 + 2018 + 34 x 2018 – 3 x 2018}$ $\\$ $\text{= 2018 x 68 + 2018 + 34 x 2018 – 3 x 2018}$ $\\$ $\text{= 2018 x (68 + 1 + 34 – 3)}$ $\\$ $\text{= 2018 x 100}$ $\\$ $\text{= 201800}$

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

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