Let's Have Some Fun... Addition and Subtraction

What are some Addition Strategies that you can use?

There are many strategies used for addition out there. Can you and your classmates discuss how you would solve the addition problems below?
7 + 4
9 + 5

there are many strategies you can use to add

• Tally Marks - You can use tally marks as a simple and efficient way to solve easier addition problems

• Number Line - You can use a number line to organize your work in the best way

• Break it Down - You can break the problem into littler, easier chunks to solve the main problem

8 + 7

6 + 5

​Can you and your classmates figure out what the answers are to these two addition problems?

You can use a number line to solve this problem. You should start at 8 and then add two to get to ten. Then and the remaining 5 from the seven.

8 + 7

You can break this problem down by solving 5 + 5 + 1. 6 + 5 and 5 + 5 + 1 are the same thing because 5 + 1 is 6.

6 + 5

If you did it correctly, you should've came up with the number 15.
Keep going!

8 + 7

If you did it correctly, you should've came up with the number 11.
Way to go!

6 + 5

Part 2 - subtraction Strategies

What are some strategies you can use to subtract?

There are many strategies used for addition out there. Can you and your classmates discuss how you would solve the subtraction problems below?
9 - 6
16 - 4

There are many strategies you can use to Subtract

• Tally Marks - You can use tally marks as a simple and efficient way to solve easier subtraction problems

• Counting Backwards - You can count backwards as a simple way to get the answer

• Number Line - You can use a number line to organize your work in the best way

12 - 5

Can you and your classmates figure out the answer to these two subtraction problems?

9 - 7

You can use a number line to solve this problem. Start by putting 12 at the end of the number line. Then subtract 2 to get to ten, then the remaining amount from the 5.

12 - 5

You can use your fingers to count backwards. First, put up nine fingers, then take away seven. The amount of fingers you have left, it your answer.

9 - 7

If you did it correctly, you should've came up with the answer 7.
Keep going!

12 - 5

If you did it correctly, you should've came up with the answer 2.
Way to go!

9 - 7

You got this!

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Know, you're going to take a little quiz

Great Job!