10 + 5
Addition is the opposite of subtraction. For example, 24 - 9 = 15. If you want to check your answer, add 9 + 15. It equals 24, so your answer is correct.
15 to the 2nd power or 15 squared equals 15 * 15 which equals 225.
15+20
15 times 15 equals 225.
15 -7 = 8
10 + 5
15+2
This is the identity property of addition.
Addition is the opposite of subtraction. For example, 24 - 9 = 15. If you want to check your answer, add 9 + 15. It equals 24, so your answer is correct.
X = 135 and y = 15 Solved by addition and substitution
yes addition is commutative so is multiplication but not subtraction
The answer is 20. In each addition, the individual digits are added together (1+2+3+5+4 = 15)
15 to the 2nd power or 15 squared equals 15 * 15 which equals 225.
The word increase means the problem is addition: 15 + x = 27. Reorder the problem so that it is subtraction: 27 - 15 = x and solve for x. X = 12.
15+20
15 percent 0 equals 0; 0 percent 15 equals 0. Both the above are true