Grade 3 Think Up Unit 13

Front

What is the difference?

Back

The answer to a subtraction problem.

Front

What are compatible numbers?

Back

Pairs of numbers that can easily be computed mentally, such as 23 + 27 is close to 25 + 25 so the estimate is 50.

Front

What does it mean to add?

Back

To combine two or more groups.

Front

What does approximate mean?

Back

To find a result that is close to the exact answer; close or near the exact answer.

Front

What does it mean to regroup?

Back

To rename a number such as 10 ones = 1 ten, 10 tens = 1 hundred, 10 hundreds = 1 thousand.

Front

What is subtraction?

Back

The process of taking away one number from another.

Front

What is multiplication?

Back

The process of combining equal groups to find the total.

Front

What is division?

Back

The process of splitting a number into equal parts.

Front

What is an estimate?

Back

An approximate calculation or judgment about a number.

Front

What is a sum?

Back

The total amount you get after adding numbers.