Simply Math

Level 1

What is \( 1 - 1=  \) ?

Whats is \( 4 - 2 =  \) ?

What is \( 8 1 6= \) ?

Whats is \( 255 - 200 = \) ?

Whats is \( 200 - 255 = \) ?

Level 2

Whats is \( (1 - 3) - 4 = \) ? 

Solution \( (1-3) - 4 = -2 - 4) = -6 \)