2021*3+2021*4+2021+2021+2021 tính bằng cách thuận tiện nhất

2 câu trả lời

   2021 x 3 + 2021 x 4 + 2021 + 2021 + 2021

= 2021 x 3 + 2021 x 4 + 2021 x 1 + 2021 x 1 + 2021 x 1

= 2021 x ( 3 + 4 + 1 + 1 + 1 )

= 2021 x 10

= 20210

`2021` × `3` + `2021` × `4` + `2021` + `2021` + `2021`

=  `2021` × `3`  + `2021` × `4` + `2021` × `3` 

= `2021` × ( `3` + `4` + `3` )

= `2021` × `10`

= `20210`

#TNT