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

Toán Lớp 6: Bài 3: Thực hiện các phép tính sau: 18 + 25 – 8 24.57 +24.43 5 . 22 – 18 : 3 25 . 8 – 12.5 + 170 : 17 – 8 18 : 3 + 182 + 3.(51 : 17) 1

Toán Lớp 6: Bài 3: Thực hiện các phép tính sau:
18 + 25 – 8
24.57 +24.43
5 . 22 – 18 : 3
25 . 8 – 12.5 + 170 : 17 – 8
18 : 3 + 182 + 3.(51 : 17)
12 : { 400 : [500 – (125 + 25 . 7)]}

Comments ( 2 )

  1. a)18 + 25 – 8
    = 43 + 8
    = 51
    b)24 × 57 +24 × 43
    = 1368 + 1032
    = 2400
    c)5 × 22 – 18 : 3
    = 110 – 6
    = 104
    d)25 × 8 – 12 × 5 + 170 : 17 – 8
    = 200 – 60 + 10 – 8
    = 140 + 10 – 8
    = 150 – 8
    = 142
    e)18 : 3 + 182 + 3 × (51 : 17)
    = 18 : 3 + 182 + 3 × 3
    = 6 + 182 + 9
    = 188 + 9
    = 197
    f)12 : { 400 : [500 – (125 + 25 . 7)]}
    = 12 : { 400 : [500 – (125 + 175)]}
    =12 : { 400 : [500 – 300]}
    =12 : { 400 : 200 }
    = 12 : 2
    = 6

  2. $\text{a)18 + 25 – 8}$
    $\text{= 25 + (18 – 8)}$
    $\text{= 25 + 10}$
    $\text{= 35}$
    $\text{b)24 · 57 + 24 · 43}$
    $\text{= 24 · (57 + 43)}$
    $\text{= 24 · 100}$
    $\text{= 2400}$
    $\text{c)25 · 8 – 12 · 5 + 170 ÷ 17 – 8}$
    $\text{= 200 – 60 + 10 – 8}$
    $\text{= 140 + 2}$
    $\text{= 142}$
    $\text{d)18 ÷ 3 + 182 + 3 · (51 ÷ 17)}$
    $\text{= 18 ÷ 3 + 182 + 3 · 3}$
    $\text{= 6 + 182 + 9}$
    $\text{= 188 + 9}$
    $\text{= 197}$
    $\text{e)12 ÷ {400 ÷ [500 – (125 + 25 · 7)]} }$
    $\text{= 12 ÷ {400 ÷ [500 – (125 + 175)]} }$
    $\text{= 12 ÷ {400 ÷ [500 – 300]} }$
    $\text{= 12 ÷ {400 ÷ 200}}$
    $\text{= 12 ÷ 2}$
    $\text{= 6}$

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

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