Inverse operations and fact families
Name: _____________________ Date: __________
Show your thinking with numbers, words, or a drawing.
1. Use 35 + 17 = 52. What is 52 − 17?
2. Use 69 + 29 = 98. What is 98 − 29?
3. Use 66 + 19 = 85. What is 85 − 19?
4. Use 37 + 53 = 90. What is 90 − 53?
5. Use 34 + 49 = 83. What is 83 − 49?
Answer key · Inverse operations and fact families
1. 35
The bar shows the whole 52 made of the parts 35 and 17.
Take away one part and the other part is left: 52 − 17 = 35.
2. 69
The bar shows the whole 98 made of the parts 69 and 29.
Take away one part and the other part is left: 98 − 29 = 69.
3. 66
The bar shows the whole 85 made of the parts 66 and 19.
Take away one part and the other part is left: 85 − 19 = 66.
4. 37
The bar shows the whole 90 made of the parts 37 and 53.
Take away one part and the other part is left: 90 − 53 = 37.
5. 34
The bar shows the whole 83 made of the parts 34 and 49.
Take away one part and the other part is left: 83 − 49 = 34.
Try it together
Choose a question from the printable. Use objects or a drawing to show your thinking, then explain your method to someone at home.