2. Do I have to add or subtract?

3. Some keywords

4. Some key questions are…

5. What do you have to do there?
Let’s try
What do you have to do there?

6. SOME STRATEGIES FOR SOLVING PROBLEMS

7. Apply the previous strategies on this problem.

9. Solve the following problems:1.

10. Mark has worked at the carnival fair this year
Mark has worked at the carnival fair this year. Help him calculate his totals by adding or subtracting. Do not forget to follow the strategies seen.

11. 1) Mark sold 1,412 pink cotton candies and 9,473 blue cotton candies
1) Mark sold 1,412 pink cotton candies and 9,473 blue cotton candies. How many cotton candies did he sell in total?

12. 2) It was a hot day and many people bought ice cream cones at the fair
2) It was a hot day and many people bought ice cream cones at the fair. Mark sold 1,872 vanilla flavoured cones, 6,532 strawberry flavoured cones, and 921 chocolate flavoured cones. How many cones did he sell in total?

13. 3) At the beginning of the year, Mark had 6,379 pretzels but by the end of the year he only had 2,874. How many did he sell?

14. 4) Mark gave away 832 neon pink balloons, 2,161 forest green balloons, 40 jumbo purple balloons and 5,291 sky blue metallic balloons. How many did he give away?

15. 5) Mark had 39,430 fun pack tickets
5) Mark had 39,430 fun pack tickets. At the end of the year he only had 1,472. How many did he sell ?