Mental Math and Reflexes

1. Mental Math and Reflexes • Begin at 50. Count by 5s to 100. • Begin at 0. Count by 25s. • Begin at 25. Count by 25s. • Begin at 10. Count by 5s. • Begin at 137. Count by 10s. • Begin at 75. Count by 25s. • Begin at 200. Count by 5s. • Begin at 1,020. Count by 10s. • Begin at 100. Count by 25s.

2. Math Message • You buy an apple that costs 37 cents. • Write P, N, D, or Q to show the coins you use to pay the exact amount. • Who would like to share their solutions?

3. How to Make Change Counting Up • You buy an orange for 60 cents. You put 3 quarters in the vending machine. • How much change should you receive? • 15 cents

4. You start with the cost of the item– 60 cents • Count up to the amount of money used to pay for the item—75 cents

5. You buy milk for 35 cents. You put 4 dimes in the vending machine. How much change should you receive? • 5 cents • You buy ice cream for 40 cents. You put 2 quarters in the vending machine. How much change should you receive? • 10 cents • You buy yogurt for 70 cents. You put 3 quarters in the vending machine. How much change should you receive? • 5 cents • You buy a pie for 45 cents. You put 2 quarters in the vending machine. How much change should you receive? • 5 cents

6. Making Change • You buy candy for 65 cents. You put 3 quarters in the vending machine. How much change should you receive? • 10 cents • You buy a slice of pizza for 85 cents. You give the clerk $1. How much change should you receive? • 15 cents

7. Practice Exact Change • Exact Game Sliding Coin Machine • Counting Coins Game • Give Change Review

8. Time Rhyme Now look at H the hour hand. H is just passed ______. Now look at M the Monster Minute Hand Start at 1 and count by 5s ____. ___:____