
Method:
Example: Addition There are 3 balls in a basket, 2 more balls are put into it. Find the total number of balls. The answer is 3 +2 = 5 Answer: 5 balls Example: Subtraction There are 4 balls in a basket, if 2 are taken out, how many are remaining in the basket. The answer is 42 = 2. Answer: 2 balls Directions: Answer the following questions. Also write at least ten examples of your own. 