Math chapter 3

Post on 30-Jun-2015

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Transcript of Math chapter 3

Divide by 2 – Digit Divisors

People in the United States eat about 23 pounds of pizza per person each year. If you ate that much pizza each year, how many years would it take you to eat 775 pounds of pizza?

Use partial quotients to solve. 775 ÷ 23

18. About how many years would it take for a person in the United States to eat 855 pounds of apples?

21. In a study, 9 people ate a total of 1,566 pounds of potatoes in 2 years. If each person ate the same amount each year, how many pounds of potatoes did each person eat in 1 year?

How can you use partial quotients to divide by 2-digit divisors?

Patterns and basic facts can help you estimate quotients by using compatible numbers.

Estimate money

25. About how many meters tall is each floor of the Williams Tower?

Is there a need to estimate in this problem or has the information already been estimated?

26. About how many meters tall is each floor of the Chrysler Building?

27. Eli needs to save $235. To earn money, he plans to mow lawns and charge $21 for each. Write two estimates Eli could use to determine the number of lawns he needs to mow. Decide which estimate you think is the better one for Eli to use. Explain your reasoning.

Draw a quick picture

19. Ms. Brill’s class is making bracelets with glass beads. Each bracelet takes 32 glass beads. How many bracelets can Ms. Brill’s class make? How many beads will be left over?

22.

21. It takes 12 drinking straws and 25 chenille stems to make a dozen craft flowers. How many dozen craft flowers can Ms. Brill’s class make? Explain your reasoning.

Divide Multiply Subtract Bring down

22. A smoothie shop receives a delivery of 800 ounces of orange juice. How any Orange Tango smoothies can be made with the orange juice?

23. The shop has 1,260 ounces of orange juice and 650 ounces of passion fruit juice. If the juices are used to make Crazy Cranberry smoothies, which juice will run out first? How much of the other juice will be left over?

24. In the refrigerator, there are 680 ounces of orange juice and 410 ounces of mango juice. What is the total number of Orange Tango smoothies that can be made? Explain your reasoning.

Unlock the Problem The girls’ club is planning a camping trip to the

Ocala National Forest. The club has $1,100 to buy tents. The girls want to buy tents that are all the same size and need to have enough room for 50 people. Which size tent should they buy? How much money will they have left over?

Tents for camping What do I need to find?

Two-person tent $68 What information do I need to use?Three-person tent $75 How will I use the information?Four-person tent $79

Maria is packing containers of trail mix for the camping trip. She has 417 ounces of trail mix. Her containers hold 12 ounces, 14 ounces or 18 ounces. She needs to fill at least 30 same-sized containers with trail mix, and she wants to use the largest containers possible. Which size container should Maria use?

What do I need to find?What information do I need to use?How will I use the information?

3. Mr. Garcia is marking the price on each hat in his store. To make a profit, he must receive at least $1,250 for 75 hats. His prices are always whole-dollar amounts. What is the least he should charge for each hat to still make a profit? How much total money will he receive?

What do I need to find?What information do I need to use?How will I use the information?

8.Suppose there are docks every 35 miles along the Yenisey River. The first dock is at mile 35. Explain how you can find the number of docks there are in all.

Unlock the Problem pg. 115 (use the chart to solve)A fifth-grade class went on a field trip to Kennedy Space Center. The students raised $1,054 to spend on souvenirs at the gift shop. They spent all the money. Each student bought 3 posters and 2 T-shirts. How many students went on the field trip?

What steps must we use take to find out how many students went on the field trip?

So, ___ students went on the field trip.

Jason bought 2 pairs of pants and 3 polo shirts for his trip. Each pair of pants cost $25 and each polo shirt cost $15. If Jason had $100 to spend, how much does he have left over?

What steps will you use to find the solution to the problem?

So, Jason has ___ left over.

7. There are 6 people on a bus. At the next stop, half the people get off the bus, and 5 more get on. When the bus stops again, no people get off the bus, and the total number on board triples. If 6 people get off at each of the next stops, and no one gets on, how many more stops will the bus need to make before it is empty?

What steps should you use to solve a multistep problem?