Question

2^20:2^18-3^20:3^19+5^0

Answer 1

2^20-18-3^1+1

2^2-3+1

4-3+1

1+1

=2

Answer 2

2²⁰ : 2¹⁸ - 3²⁰ : 3¹⁹ + 5⁰ = 2

= 2 ⁽ ²⁰ ⁻ ¹⁸ ⁾  - 3 ⁽ ²⁰ ⁻ ¹⁹ ⁾  + 1 =

= 2 ² - 3 ¹ + 1 =

= 4 - 3 + 1 =

= 1 + 1 =

= 2