Mấy anh chị giúp e vs ah

`a) 27.75 +25.27-2.3.5^2`

`= 2025+675-2.3.25`

`= 2025 +675-150`

`= 2550.`

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`b) 12:{400:[500-(125+25.7)]}`

`= 12:{400:[500-(125+175)]}`

`= 12:{400:[500-300]}`

`= 12:{400:200}`

`= 12:2`

`= 6.`

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`c) 13.17-256:16+14:7-2021^0`

`= 221-256:16+14:7-2021^0`

`= 221-16+14:7-2021^0`

`= 221-16 + 2-2021^0`

`= 221-16+2-1`

`= 223-16-1`

`=223-17`

`=206.`

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`d) 2.3^2 :3+182+3.(51:17)`

`= 2.3+182+3.(51:17)`

`= 2.3+182+3.3`

`= 6+182+3.3`

`= 6+182+9`

`=197.`

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`e) 15-5^2 .2^3 :(100.2)`

`= 15-5^2 .2^3 : 200`

`= 15- {5^2 .2^3}/{200}`

`= 15- {25.8}/{200}`

`= 15- 8/8`

`=15-1`

`=14.`

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`f) 5^2 .2^3 -12.5+170:70-8`

`= 25 .2^3 -12.5+170:70-8`

`= 25.8-12.5+170:70-8`

`=200-60+ 170/70 -8`

`= 132+ 170/70`

`= 941/7.`