Arithmetic Grade Two

Lesson Fourteen: Doubles in Addition and Subtraction

Doubles in Addition and Subtraction


	1 + 1 = 2	-->	2 - 1 = 1

	4 + 4 = 8	-->	8 - 4 = 4

	3 + 3 = 6	-->	6 - 3 = 3

	2 + 2 = 4	-->	4 - 2 = 2

Look at these problems carefully to see a pattern.