tính nhanh nếu có thể ( 15 + 2021 + 47 ) – ( 15 + 47 ) nhanh nha cần gấp ạ

Question

tính nhanh nếu có thể
( 15 + 2021 + 47 ) – ( 15 + 47 )
nhanh nha cần gấp ạ

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Sarah 17 phút 2021-09-22T14:20:08+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-09-22T14:21:37+00:00

    ( 15 + 2021 + 47 ) – ( 15 + 47 )

    = 15 + 2021 + 47 – 15 – 47

    = (15 – 15) + (47 – 47) + 2021

    = 0 + 0 + 2021

    = 2021

    0
    2021-09-22T14:21:52+00:00

    ( 15 + 2021 + 47 ) – ( 15 + 47 )

    =15 + 2021 + 47 – 15 – 47

    = (15-15)+(47-47)+2021

    =2021

     

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