Presentation is loading. Please wait.

Presentation is loading. Please wait.

Inverse You will learn: That addition is the inverse of subtraction. To check your answers by using the inverse operation. To solve simple missing number.

Similar presentations


Presentation on theme: "Inverse You will learn: That addition is the inverse of subtraction. To check your answers by using the inverse operation. To solve simple missing number."— Presentation transcript:

1

2 Inverse You will learn: That addition is the inverse of subtraction. To check your answers by using the inverse operation. To solve simple missing number problems by using the inverse method.

3 Can you turn these addition number sentences into subtractions? 6+2=8 9+7= = =61 8-2=6 16-7= = =39 Can you make a different subtraction?

4 You can use this method to check your answers. 9+4=13 Check your answer by turning it into a subtraction: 13-4= 9 or 13-9=4

5 What would you do if an equation had a missing number? +7=15

6 It is not a straight forward task, so use the numbers you have been given! +7=15 It is an addition, so start at the end and turn it into a subtraction… 15-7=88

7 It is not a straight forward task, so use the numbers you have been given! -9=16 It is a subtraction, so start at the end and turn it into an addition… 16+9=25

8 In your books, try to solve these problems. Record the inverse calculation. +13=29 +20=41 +17=31 +14=35 -8=14 -19=13 -27=56 -30=65

9 Plenary Addition and subtraction are the inverse of each other. Use this fact to help you check your answers when performing addition and subtraction calculations. If the first number of a problem is missing, try using the inverse method.


Download ppt "Inverse You will learn: That addition is the inverse of subtraction. To check your answers by using the inverse operation. To solve simple missing number."

Similar presentations


Ads by Google