88 = 80 + 8 80 + 8 = 88 42 = 40 + 2 40 + 2 = 42 51 = 50 + 1 50 + 1 = 51 The answer to an addition problem is called the sum. The numbers that are added together are called addends.
NOTE: Make sure the student knows the words addends and sum and can point to examples of each in number sentences.