Standard(s):
[MA2019] (1) 5 : 5. Relate counting to addition and subtraction.
Example: counting on 2 to add 2
[MA2019] (1) 7 : 7. Explain that the equal sign means "the same as." Determine whether equations involving addition and subtraction are true or false.
Example: determining which of the following equations are true and which are false: 6 = 6, 7 = 8 - 1, 5 + 2 = 2 + 5, 4 + 1 = 5 + 2
