8 and 7
6 and 9
10 and 5
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In the context of addition, the number that equals 15 can be expressed as a sum of two addends. Therefore, the equation can be written as x + y = 15, where x and y are the two addends. To find the specific values of x and y that satisfy this equation, one must consider all possible combinations of numbers that add up to 15, such as 7 + 8, 6 + 9, or any other pair of numbers that sum to 15.
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.