Adding and Subtracting within 100

Front

What is addition?

Back

Addition is the process of finding the total or sum by combining two or more numbers.

Front

What is subtraction?

Back

Subtraction is the process of finding the difference between two numbers by taking one number away from another.

Front

What is the sum of 10 and 8?

Back

18

Front

What is 75 minus 7?

Back

68

Front

How do you find the total number of items when you add more?

Back

You add the number of items you have to the number of items you are adding.

Front

If I have 12 cookies and buy 42 more, how many cookies do I have now?

Back

54

Front

What does it mean to count back on a number line?

Back

Counting back means to move left on the number line to find a smaller number.

Front

What is the difference between 79 and 8?

Back

71

Front

If you have 15 and subtract 5, what do you get?

Back

10

Front

What is a number line?

Back

A number line is a straight line with numbers placed at equal intervals used to represent numbers.