
Current Math Topic Understanding Addition and Subtractionpart  a piece of a whole 2 and 3 are parts of 5.whole  You add parts to find the whole. 2 + 3 = 5 The whole is 5.addend  the numbers you add together to find the whole 2 + 3 = 5 2 and 3 are addends.subtract  You can subtract a part from the whole to find the missing part. 5  3 = 2.difference  The difference is the amount that is left over after you subtract. 4  1 = 3.subtraction sentence  A subtraction sentence is a way to show a subtraction problem. 7  3 = 4 is a subtraction sentence.
Last Modified on May 19, 2015