Tính: ( 35 – m + 2021 ) – ( – 65 – m + 21 )

2 bình luận về “Tính: ( 35 – m + 2021 ) – ( – 65 – m + 21 )”

1. (35 – m+ 2021) – (-65 – m + 21)

   = 35 – m + 2021 + 65 + m -21

   = (35 + 65) + (m – m) + (2021 – 21)

   = 100 + 2000

   = 2100

   $#duong612009$

   Trả lời
2. (35-m+2021)-(-65-m+21)

   =35-m+2021+65+m-21

   =(35+65)+(2021-21)+(m-m)

   =100+2000+0

   =100+2000

   =2100

   Trả lời