Tính nhanh : 21/11× 22/17× 68/63

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Tính nhanh : 21/11× 22/17× 68/63

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Mít Mít 5 years 2021-05-19T02:29:48+00:00 2 Answers 35 views 0

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  1. quangkhai
    0
    2021-05-19T02:31:29+00:00
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    `21/11xx22/17xx68/63`

    `=(21xx11xx2xx17xx4)/(11xx17xx21xx3)`

    `=(2xx4)/3`

    `=8/3`

    Xin hay nhất ạ.

  2. thienthi
    0
    2021-05-19T02:31:32+00:00
    Reply

    `21/11× 22/17× 68/63`
    ` = (21× 22× 68)/(11 × 17× 63)`
    ` = ( 21 ×  11 × 2  × 4 ×  17)/(11 ×  17 ×  21 ×  3)`
    ` = (2× 4)/3`

    ` =8/3`

     

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