CFA Grade 1: OA.1.1

Front

What is subtraction?

Back

Subtraction is taking away a number from another number. For example, in the equation 10 - 4 = 6, we take away 4 from 10.

Front

What does the equal sign (=) mean?

Back

The equal sign means that the two sides of the equation have the same value. For example, in 5 + 3 = 8, both sides equal 8.

Front

Fill in the blank: 10 - __ = 6

Back

4

Front

What is addition?

Back

Addition is putting together two or more numbers to find a total. For example, 3 + 2 = 5.

Front

Which equation is true? 7 + 2 = 8, 6 + 3 = 9, 5 + 5 = 11, 4 + 4 = 7

Back

6 + 3 = 9

Front

How do you find the total number of items?

Back

You add the number of items together. For example, if you have 5 red marbles and 6 blue marbles, you add them: 5 + 6 = 11.

Front

What is the missing number? 12 = 8 + __

Back

4

Front

What does it mean to give away items?

Back

Giving away items means you are subtracting from what you have. For example, if Sally has 7 apples and gives away 3, she subtracts 3 from 7.

Front

How many apples does Sally have left if she gives away 3 from 7?

Back

4

Front

What is a number line?

Back

A number line is a straight line that shows numbers in order. It helps us understand addition and subtraction.