1). 2 × n = 800
n = 800
n = 800 ÷ 2
n = 400
2). 23³ - 457 ≈
≈ (23 × 23 × 23) - 457
= 12.167 - 147
= 12.020
3). 2! = 2 × 1
= 1
_______________________
2). 23³ - 457 =
= (23 × 23 × 23) - 457
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1). 2 × n = 800
n = 800
n = 800 ÷ 2
n = 400
2). 23³ - 457 ≈
≈ (23 × 23 × 23) - 457
= 12.167 - 147
= 12.020
3). 2! = 2 × 1
= 1
1). 2 × n = 800
n = 800
n = 800 ÷ 2
n = 400
_______________________
2). 23³ - 457 =
= (23 × 23 × 23) - 457
= 12.167 - 147
= 12.020
_______________________
3). 2! = 2 × 1
= 1