Question

20 - 10 : 5 + 5 = ?

( 4 + 3 * 6 ) : ( 5 + 6 ) = ?

84 - 8 : 4 + 2 * 15 : 3 = ?

( - 1 )^2 + 1 - 2^6 : 2^3 + 4 * ( 17 - 15) = ?

Answer 1

20 - 10 : 5 + 5 = 23
= 20 - 2 + 5 = 
= 18 + 5 = 
= 23

( 4 + 3 × 6 ) : ( 5 + 6 ) = 2
= ( 4 + 18 ) : 11 = 
= 22 : 11=
= 2

84 - 8 : 4 + 2 × 15 : 3 = 92
= 84 - 2 + 30 : 3 =
= 82 + 10 = 
= 92 

( - 1 )² + 1 - 2⁶ : 2² + 4 × ( 17 - 15) = - 6 
= 1 + 1 - 2⁽⁶⁻²⁾ + 4 x 2 = 
= 2 - 2⁴ + 8 = 
= 2 - 16 + 8 =
= - 14 + 8 = 
= - 6

Daca este (- 2)⁶ : 2² = + 2⁴= + 16