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

Toán Lớp 6: f) 89 – 490 g) 145 – ( -80) h) ( -125) + 80 + ( -75) – 80 i) -146 – 57 + 46 – 143 j) ( -12) . 47 + ( -12) . 25 + ( -12). 38 k) 45.

Tháng Ba 31, 2022 Toán học 1 Comment 0 views

Toán Lớp 6: f) 89 – 490
g) 145 – ( -80)
h) ( -125) + 80 + ( -75) – 80
i) -146 – 57 + 46 – 143
j) ( -12) . 47 + ( -12) . 25 + ( -12). 38
k) 45. ( – 67) + ( -45) . 33

Comments ( 1 )

  1. lanminhngoc
    lanminhngoc
    31 Tháng Ba, 2022 at 2:42 chiều
    Reply
    f) 89 – 490
    = – (490 – 89)
    = – 401
    ______________
    g) 145 – (-80)
    = 145 + 80
    = 225
    ______________
    h) (-125) + 80 + (-75) – 80
    = (-125 – 75) + (80 – 80)
    = -200 + 0
    = -200
    ______________
    i) -146 – 57 + 46 – 143
    = (-146 + 46) + (-57 – 143)
    = -100 + (-200)
    = -300
    ______________
    j) (-12) . 47 + (-12) . 25 + (-12) . 38
    = (-12) . (47 + 25 + 38)
    = -12 . 110
    = -1320
    ________________
    k) 45 . (-67) + (-45) . 33
    = 45 . [-67 + (-33)]
    = 45 . (-100)
    = -4500

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

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