Is the sum of 9 + 3 even or odd?

Is the sum of 6 + 7 even or add?

Which number sentence(s) shows the commutative property?

Select all the numbers that round to 300 when rounded to the nearest hundred.

Jana bought two bags of dog food. One bag weighted 37 lbs and the other weighed 15 lbs. How much did both bags weigh?

Which property states that you can group addends in different ways and get the same sum?

There were 492 sweaters sold in January, 176 sweaters sold in February, and 345 sweaters sold in March. How many sweaters were sold in January and February?

Find the sum of 346 + 421 + 152. Select all the apply:

Alexandra has 78 emails in her inbox. She deletes 47 emails. How many does she have left in her inbox?

Sam has 402 Legos in his toy box. He uses 186 to build a fort. How many Legos does he have left?

Morningside Elementary is having a read-a-thon. Their goal is to read more than 900 books. Students have read 573 books. What is the least number of books students need to read to reach their goal?

Alicia used 67 + 38 = 105 to check her subtraction. Which math problem could she be checking? Mark all that apply.

500 + 20 + 6 PLUS 200 + 40 + 8 is an example of which strategy?

How can I check my answer when I subtract? Mark all that apply.

Which problem shows the Identity Property of Addition?

Use any strategy to solve the following problem:

700 - 389 = ?

How can estimating before solving an addition or subtraction problem be helpful?