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

Toán Lớp 7: Viết gọn biểu thức sau: a) 3,2^6 . 3,2^4 b) (–1,3)^5 . (–1,3)^7 c) (-2/3)^6 . (-2/3)^4 d) (-1/5)^7 : (-1/5)^4

Toán Lớp 7: Viết gọn biểu thức sau:
a) 3,2^6 . 3,2^4 b) (–1,3)^5 . (–1,3)^7
c) (-2/3)^6 . (-2/3)^4 d) (-1/5)^7 : (-1/5)^4

Comments ( 1 )

  1. a)
    3,2^6 . 3,2^4
    = 3,2^(6 + 4)
    = 3,2^10
    b)
    (-1,3)^5 . (-1,3)^7
    = (-1,3)^(5 + 7)
    = (-1,3)^12
    c)
    (-2/3)^6 . (-2/3)^4
    = (-2/3)^(6 + 4)
    = (-2/3)^10
    d)
    (-1/5)^7 : (-1/5)^4
    = (-1/5)^(7 + 4)
    = (-1/5)^11

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

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