a) 20 . 15 . 5 + 10 . 14 . 10 + 50 . 13 . 2 b) 16 . 125 – 16 . 25

Question

a) 20 . 15 . 5 + 10 . 14 . 10 + 50 . 13 . 2
b) 16 . 125 – 16 . 25

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Doris 5 years 2020-11-28T23:31:58+00:00 2 Answers 47 views 0

Answers ( )

  1. kiet
    0
    2020-11-28T23:33:04+00:00
    Reply

    a)20 . 15 . 5 + 10 . 14 . 10 + 50 . 13 . 2

       =(20.5).15 +(10.10).14 +(50.2).13

        =100.15+100.14+100.13

         =100.(15+14+13)

    =100.42=4200

    b) 16 . 125 – 16 . 25

    =16.(125-25)

    =16.100=1600

    Chúc học tốt!

  2. Gerda
    0
    2020-11-28T23:33:28+00:00
    Reply

    a) `20.15.5+10.14.10+50.13.2`

    `=(20.5).15 +(10.10).14 +(50.2).13`

    `=100.15+100.14+100.13`

    `=100.(15+14+13)`

    `=100.42`

    `=4200`

    b) `16.125-16.25`

    `=16.(125-25)`

    `=16.100`

    `=1600`

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )