Question

bài 1 tính 
a, 45 + 128 + 55 - 28 
b, 2022.194 - 2022.94 - 2200
c, 2³. 2 - 3⁴ : 3²
d, 560 : { 130 - [( 5 . 14 - 65 ) . 3 + 3 ]}
giúp tui với cảm ơn

Answer 1

bài 1 tính 
`a, 45 + 128 + 55 - 28 `

`=(45 +55)+(128-28)`

`=100+ 100`

`=200`
`b, 2022.194 - 2022.94 - 2200`

`=2022.(194-94)-2200`

`=2022.100-2200`

`=202200-2200`

`=200000`

`c, 2^3 .2 -3^4 :3^2`

`=2^(3+1) - 3^(4:2)`

`=2^4 - 3^2`

`=16-9`

`=7`

`d, 560 : { 130 - [( 5 . 14 - 65 ) . 3 + 3 ]}`

`= 560 : { 130 - [(70-65) . 3 + 3 ]}`

`= 560 : [ 130 - (5 . 3 + 3 )]`

`= 560 : [ 130 - (15+3) ]`

`= 560 :(130-18)`

`=560: 112`

`=5`