Chapter 3-Basic Facts & Relationships

Front

What is subtraction?

Back

Subtraction is taking away a number from another number. For example, 10 - 3 = 7.

Front

What is addition?

Back

Addition is combining two or more numbers to find a total. For example, 4 + 5 = 9.

Front

If there are 13 rocks and 5 are left, how many were taken?

Back

8 rocks were taken.

Front

What is the sum of 9 + 3 + 1?

Back

The sum is 13.

Front

If Bob sees 7 fish and Tom sees 1 more, how many fish do they see in total?

Back

They see 15 fish in total.

Front

What does 'sum' mean?

Back

The sum is the result of adding two or more numbers together.

Front

What is a doubles fact?

Back

A doubles fact is a math fact where a number is added to itself, like 4 + 4 = 8.

Front

What is the equation for finding the sum of 5 + 8?

Back

5 + 8 = 13.

Front

If Tim has 6 baseballs and gets 9 more, how many does he have now?

Back

He has 15 baseballs.

Front

What is the meaning of 'more than'?

Back

'More than' means to add to a number. For example, 3 more than 5 is 8.