Adding and Subtracting with NumberLine

Front

What is the result of 30 - 9?

Back

21

Front

What is the result of 23 - 8?

Back

15

Front

What is the result of 20 + 10?

Back

30

Front

What is the result of 25 - 5?

Back

20

Front

What is the result of 17 - 4?

Back

13

Front

What does a number line represent in addition and subtraction?

Back

A number line visually represents numbers in a straight line, showing the distance and direction of addition and subtraction.

Front

How do you perform addition on a number line?

Back

To add on a number line, start at the first number and move to the right by the value of the second number.

Front

How do you perform subtraction on a number line?

Back

To subtract on a number line, start at the first number and move to the left by the value of the second number.

Front

What is the commutative property of addition?

Back

The commutative property states that changing the order of the numbers in an addition problem does not change the sum (e.g., a + b = b + a).

Front

What is the associative property of addition?

Back

The associative property states that the way numbers are grouped in addition does not change the sum (e.g., (a + b) + c = a + (b + c)).