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

Toán Lớp 7: 25 x ( – 2) ^ 2 + 5 x ( 2 + 3 ) 667 – 195 x 93 : 465 + 372 ( 7 + 3 ^3 : 3 ^ 2 ) x 4 – 3

Toán Lớp 7: 25 x ( – 2) ^ 2 + 5 x ( 2 + 3 )
667 – 195 x 93 : 465 + 372
( 7 + 3 ^3 : 3 ^ 2 ) x 4 – 3

Comments ( 2 )

  1. Ta có : 
    **)     25.(-2)^2 + 5.(2+3)
    = 25.4 + 5.6
    = 100 + 30
    =130
    **)     667-195.93:465+372
    = 667-18135:465+372
    = 667-39+372
    = 628+372
    = 1000
    **)     (7+3^3:3^2).4-3
    = (7+27:9).4-3
    = (7+3).4-3
    = 10.4-3
    = 40-3
    = 37

  2. 25 × ( – 2) ^ 2 + 5 × ( 2 + 3 )
    = 25×4+5×5
    = 25×4+25
    = 100+25
    = 125
    667 – 195 × 93 : 465 + 372
    = 667-18315:465+372
    = 667-39+372
    = 1000
    (7+3^3 : 3^2 )×4-3
    = (7+3^(3-2))×4-3
    = (7+3^1)×4-3
    = (7+3)×4-3
    = 10×4-3
    = 40-3
    = 37

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