Exploring Addition and Subtraction
Mrs. Wu has 48 math cards. Then she opens a pack of 20 math cards. Which number sentence shows how many math cards Mrs. Wu has now?
42 people went to the park. Then 9 more people went to the park. How many people went to the park in all?
Rick picks up 42 sticks.Troy picks up 54 sticks. How many sticks are there in all?
Lisa has 18 markers. Adam has 22 markers. How many markers are there in all? Use the hundred chart to show your work.
Katrina has 53 balloons. 30 of them pop. How many balloons are left?
Tyler has 100 cards. 52 cards are in a box. The rest are in a stack. How many cards are in the stack?
Emma has 66 rocks. She gives 23 rocks to Gus. How many rocks does Emma have now? Use the hundred chart to show your work.
Cameron has 45 stamps. He uses 20 stamps. Then he buys 7 more stamps. How many stamps does he have now?
Show your work by writing the number sentences to solve BOTH parts.
Shelden has 100 blueberries to put in two boxes. She put 75 blueberries in one box. How many did she put in the other box?
There are 24 cows in a field. 5 more cows walk onto the field. Then, 13 cows walk off the field. How many cows will there be in all?
Show your work by writing the number sentences to solve BOTH parts.