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

Toán Lớp 6: a) 79 . 283 + 21 . 301 + 79 . 17 – 21

Toán Lớp 6: a) 79 . 283 + 21 . 301 + 79 . 17 – 21

Comments ( 2 )

  1. Giải đáp:
    a)
    79.283+21.301+79.17-21
    =(79.283+79.17)+(21.301-21.1)
    =79.(283+17)+21.(301-1)
    =79.300+21.300
    =300.(79+21)
    =300.100
    =30000

  2. 79 . 283 + 21 . 301 + 79 . 17 – 21
    =79.(283+17)+21.301-21.1
    =79.300+21.(301-1)
    =79.300+21.300
    =(79+21).300
    =100.300
    =30000

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