17 x 85 + 15 x 17 - 2 mũ 3x3 x5 b, 2 mũ 3 x17 - 2 mũ 3 x 14 c,20-[ 30-(5-1)mũ 2 d, 75-(3 x 5 mũ 2-4 x 2 mũ 3) e,2x 5 mũ 2 + 3 : 71 mũ 0 - 54 : 3 mũ 3

Answer

`a, 17 xx 85 + 15 xx 17 - 2^3 xx 3 xx 5`

`= 17 xx 85 + 15 xx 17 - 8 xx 15`

`= 17 xx (85 + 15) - 8 xx 15`

`= 17 xx 100 - 120`

`= 1700 - 120`

`= 1580`

______________________________________

`b, 2^3 xx 17 - 2^3 xx 14`

`= 2^3 xx (17 - 14)`

`= 8 xx 3`

`= 24`

______________________________________

`c, 20 - [30 - (5 - 1)^2]`

`= 20 - (30 - 4^2)`

`= 20 - (30 - 16)`

`= 20 - 14`

`= 6`

______________________________________

`d, 75 - (3 xx 5^2 - 4 xx 2^3)`

`= 75 - (3 xx 25 - 4 xx 8)`

`= 75 - (75 - 32)`

`= 75 - 75 + 32`

`= 32`

______________________________________

`e, 2 . 5^2 + 3 : 71^0 - 54 : 3^3`

`= 2 . 25 + 3 : 1 - 54 : 27`

`= 50 + 3 - 2`

`= 51.`