B1: thực hiện phép tính A, (-2021)-(623-2021)+523 B, |(-2)mũ2 – 3 mũ 3 | + 2021 mũ 0 – ( -1) mũ 2020 19/09/2021 Bởi Eden B1: thực hiện phép tính A, (-2021)-(623-2021)+523 B, |(-2)mũ2 – 3 mũ 3 | + 2021 mũ 0 – ( -1) mũ 2020
`A=(-2021)-(623-2021)+523` `A=-2021-623+2021+523` `A=-100` … `B=|(-2)^2-3^3|+2021^0-(-1)^2020` `B=|4-27|+1-1` `B=|-23|` `B=23` Bình luận
a) `-2021-(623-2021)+523` `= -2021 – 623 + 2021 + 523` `= (-2021 + 2021) – 623 + 523` `= -623 + 523` `= -100` b) `| (-2)^2 – 3^3| + 2021^0 – (-1)^2020` `= |4 – 27| +1 – 1` `= 23 +1-1` `= 23` Bình luận
`A=(-2021)-(623-2021)+523`
`A=-2021-623+2021+523`
`A=-100`
…
`B=|(-2)^2-3^3|+2021^0-(-1)^2020`
`B=|4-27|+1-1`
`B=|-23|`
`B=23`
a) `-2021-(623-2021)+523`
`= -2021 – 623 + 2021 + 523`
`= (-2021 + 2021) – 623 + 523`
`= -623 + 523`
`= -100`
b) `| (-2)^2 – 3^3| + 2021^0 – (-1)^2020`
`= |4 – 27| +1 – 1`
`= 23 +1-1`
`= 23`