= Magic Math (Checking)

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Presentation transcript:

+ 3 1 4 8 2 9 6 = 10 7 5 - Magic Math (Checking) 10 7 5 - GLE 0106.3.2 Understand that addition and subtraction are inverse operations.

6 3 + 3 = 3 + 3 = 6 Let’s start with something easy! Now, let’s learn some new words. 3 + 3 = 6 The numbers you are adding are called addends. The answer is called the sum.

3 + 3 = 6 to , 6 – 3 = 3 You can check a Math problem to see if your answer is correct. 3 + 3 = 6 to , Subtract one of the addends from the sum. The answer should be the other addend. If not, try again. 6 – 3 = 3

Try this: 14 7 + 7 = Now let’s it! 14 – 7 = 7 CORRECT!

Now, try these: Now, let’s them. 6 + 6 = 4 + 4 = 8 + 8 = 5 + 5 = 2 + 2 = 9 + 9 = Now, let’s them.

12 - 6 = 8 - 4 = 16 - 8 = 10 - 5 = 18 - 9 = 4 - 2 =

Are you correct? WAY 2 Go! 6 + 6 = 12 4 + 4 = 8 8 + 8 = 16 5 + 5 = 10 4 + 4 = 8 8 + 8 = 16 5 + 5 = 10 2 + 2 = 4 9 + 9 = 18 WAY 2 Go!