Unknown Number/Counting On

Front

What is an unknown number in an equation?

Back

An unknown number is a value we need to find in a mathematical equation, often represented by a blank or a symbol like x.

Front

What does it mean to count on?

Back

Counting on means starting from a number and adding more to it. For example, starting from 5 and counting on 3 gives you 8.

Front

Back

4

Front

If you have 5 and count on 3, what number do you reach?

Back

8

Front

Back

4

Front

Back

True

Front

Back

4

Front

What is subtraction?

Back

Front

What is addition?

Back

Front

Back

7