The answer is 10. Simply add the numbers together arithmetically as you would for the problem two plus two. To check your work, a calculator is the best option.
10
10 because 10+10=20 20*0=0 0+10=10
20
It is: 110
20
-10 plus 10 equals 0.
0
10. 10x0=0 + 10 = 10
0 plus 501-60-600 plus 10 is equal to -149
20 as 10 x 0 = 0 so is just 10 + 10 = 20
It is: 10+(-10) = 0
It is: 10+(-10) = 0
-10+0 is -10