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

Toán Lớp 6: a)10+(5-15) b)36:3²-5.2² c)(-125)-[148+5.(-25)] d)18:3²+5.2³ e)25.26+74.25 f)145+53+(-145)+47 g)(-60)+2².{[(-35)+5².3];(-8)-15} h)117:{

Toán Lớp 6: a)10+(5-15)
b)36:3²-5.2²
c)(-125)-[148+5.(-25)]
d)18:3²+5.2³
e)25.26+74.25
f)145+53+(-145)+47
g)(-60)+2².{[(-35)+5².3];(-8)-15}
h)117:{[79-3(33-17)]:7+2}
Tính(Tính hợp lí nếu có thể) giúp zs ạ

Comments ( 1 )

  1. a)10+(5-15)
    = 10 + (-10)
    = 0
    b)36:3²-5.2²
    = 36 : 9 – 5 . 4
    = 4 – 20
    = -16
    c)(-125)-[148+5.(-25)]
    = -125 – ( 148 + (-125)]
    = – 125 – 23
    = -148
    d)18:3²+5.2³
    =18 : 9 + 5 . 8
    = 2 + 40
    = 42
    e)25.26+74.25
    = 25.(26+74)
    = 25 . 100
    = 2500
    f)145+53+(-145)+47
    = 145 + (-145) + (53+47)
    = 0 +100
    = 100
    g)(-60)+2².{[(-35)+5².3]:(-8)-15}
    =(-60)+4.{[(-35)+25.3]:(-8)-15}
    =(-60)+4.{[(-35)+75]:(-8)-15
    = -60 + 4.{2625:(-8) – 15}
    = – 60 + 4.{-328,125 – 15 }
    = – 60 + 4 .  ( -343,125)
    = – 60 + (-1,372.5)
    =1,432.5
    h)117:{[79-3(33-17)]:7+2}
    = 117:{[79-3 . 16]:7+2}
    = 117:{[79-48] : 7 + 2}
    =117:{31 : 7 + 2}
    = 117 : {$\frac{31}{7}$ + 2 }
    = 117 : $\frac{45}{7}$ 
    = 18,2

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