Warm Up1. What is the DIFFERENCE in the

AREA of the two rectangles?

2. How many centimeters are equal to 12 meters? (Use your mathematics chart)

4 cm

11 cm 9 cm

14 cm

3. Each number in Set A is related in the same way to the number below it in Set B.

If the number in Set A is 56, what would the related number in Set B be?

4. Alan wrote down the number of fish he caught at the lake. Then he multiplied the number by 3 and subtracted 5 from the product. The result was 13. What was the number of fish Alan caught?

Set A 21 35 49 63 77Set B 3 5 7 9 11

Ten Minute Math LARGEST DECIMAL

You will have 30 seconds to decide which decimal you think is the largest. Send your answer in on your CPS remote.

4.56 4.65

Ten Minute Math LARGEST DECIMAL

You will have 30 seconds to decide which decimal you think is the largest. Send your answer in on your CPS remote.

.02 .20

Ten Minute Math Elapsed Time

Emily started babysitting at 6:35pm and stopped at 11:05pm. How long did Emily

babysit?

Ten Minute Math Multiplication/Division

64 x 42

738 ÷ 9

For his birthday, Nicholas received $20.00 and 29 toy cars. The week after his birthday he rode his bike 1.7 miles to the mall to go shopping. He purchased a book for $4.25, two puzzles for $1.25 each, and a model airplane for $5. All the models in the store cost $5.

1.How much more did Nicholas spend for the book than for the puzzles?

Ten Minute Math Quick Images

First View…

Ten Minute Math Quick Images

Second view…

Ten Minute Math Quick Images

Final View…

How can we use estimation as a multiplication strategy?

Closest Estimate 28 x 15 =

Today we are going to talk about estimating, or getting answer that are “close enough,” even if they are not the exact answer.

When do you think it might be useful to estimate?

Can you think of a situation for 28 x 15 when all you might need is an estimate, or to know ABOUT how much?

Example: We have 300 students who need pencils. If pencils come in packages of 15, do we have enough if we have 28 packages?

Talk with your shoulder partner. Think of a way to answer the question without actually solving 28 x 15. Consider what you know about the numbers in the problem that can help you make an estimate? 

How can we use estimation as a multiplication strategy?

Closest Estimate 28 x 15 =

What are some ways you and your partner estimated for 28 x 15?

Let’s look at another problem, but this time I am going to give you a choice of possible estimates. Your job is to determine the closest estimate.

41 x 26 =

100 800 1,000

Activity: Closest Estimate VIP1. Work with your group to

determine the closest estimates for the problems on Student Activity Sheet 1.

2. After your group has determined the closest estimates, go back and actually solve the problems and compare the actual solutions with your estimates.

3. If you finish early, make up your own Closest Estimate problems to share with your group.

Discussion: Using What You Know 2. 18 x 26 =

400 600 1,000

How did you decide which of these estimates was the closest?

Possible strategies:

Changing to a landmark number (20 x 20=400 or 20 x 25=500)

Multiplying multiples of 10 (18 x 2 = 36, so 18 x 20 = 360)

Multiplying the tens digits (10 x 20 = 200)

Did anyone solve for the EXACT answer of 18 x 26? If so, how did it compare to your estimate?

Did you use any of the same strategies when you solved for the exact answer that you used when you estimated?

How can we use estimation as a multiplication strategy?

Mark your spot,Look to the right

4 or less are out of sight

  5 or more will buy 1 more

Before they too go out the door  

In those empty right-hand spaces0’s take their proper places.

 

Rounding Rap

Click for All Together

Click for Repeat

Activity

Kamico: Draco the Unroundable