Operations and Algebraic Thinking 1.OA
Understand and apply properties of operations and the relationship between
addition and subtraction.
1.OA.3
1. Patty put 1 red cube in a box. Then she put 4 green cubes in the box. How many
cubes did Patty put in the box? Write two different addition sentences. (commutative
property of addition)
1 + 4 = _____
4 + 1 = _____
2. Paul has 3 blue cubes in a box. Then he put 6 yellow cubes in the box. How many
cubes did Paul put in the box? Write two different addition sentences.
_____ + _____ = _____
_____ + _____ = _____
3. Jen and her friends collect seashells. Jen has 3 seashells in her bag. One of her
friends has 4 seashells in her bag and another of her friends has 6 seashells. How
many seashells do the friends have in all? (associative property of addition)
3 + 4 + 6 = _____ so
3 + 10 = _____
4. Matt has 4 pencils, 7 markers, and 6 pens. He wants to know how many items he
bought in all. He added six plus 4 first. What should Matt add next?
_____ + _____ = _____