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

Toán Lớp 6: Tính hợp lí: 7) (−65) + 82 − (−15) + ( −32) 8) (311 + 63) − (311 − 37) 9) [(12 − 38): 2 − 4]. (−2) 10) (−8). 7 + ( −8). 13 11) (−5). 72

Toán Lớp 6: Tính hợp lí:
7) (−65) + 82 − (−15) + ( −32)
8) (311 + 63) − (311 − 37)
9) [(12 − 38): 2 − 4]. (−2)
10) (−8). 7 + ( −8). 13
11) (−5). 72 + 5. ( −29) − (−5)
12) 128. (278 − 302) + 278. (302 − 128)

Comments ( 1 )

  1. Giải đáp:
     
    Lời giải và giải thích chi tiết:
    7) (−65) + 82 − (−15) + ( −32)
    = ( -65 + 15 ) + ( 82 – 32)
    = 50 + 50
    = 100
    8) (311 + 63) − (311 − 37)
    = 311 + 63 − 311 + 37
    = ( 311 – 311) + ( 63 + 37 )
    = 100
    10) (−8). 7 + ( −8). 13
    = (-8) . ( 7 + 13 )
    = -8 . 20
    = – 160

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