3.OA.8

Front

What is subtraction?

Back

Subtraction is the process of taking one number away from another. It shows how many are left after some have been taken away.

Front

What is addition?

Back

Addition is the process of combining two or more numbers to find their total.

Front

What does 'total' mean in math?

Back

The total is the sum or result of adding numbers together.

Front

How do you find out how many are left after giving some away?

Back

You subtract the number given away from the total number you had.

Front

If you have 100 pages in a book and read 37 pages, how many pages do you have left?

Back

You have 63 pages left (100 - 37 = 63).

Front

What is a number sentence?

Back

A number sentence is a mathematical statement that shows a relationship between numbers using operations like addition or subtraction.

Front

How do you calculate the total number of items in groups?

Back

Multiply the number of items in each group by the number of groups.

Front

If you have 8 groups with 3 marbles each, how many marbles do you have in total?

Back

You have 24 marbles (8 groups × 3 marbles = 24 marbles).

Front

What does 'remaining' mean?

Back

Remaining refers to what is left after some has been taken away.

Front

If you have 56 marbles and get 15 more, how many do you have now?

Back

You have 71 marbles (56 + 15 = 71).