1. Essential Questions & Activities
Chapter 4
Essential Questions
&
Activities

2. EQ – 4.1
What strategies can you use to multiply multiples of 10, 100, 1,000 by a 1- digit number?

3. Review Vocabulary:
multiple-The product of two counting numbers. Example: product- answer to multiplication problem Example: 6 × 2 = 12 factor-A number that is multiplied by another number to find a product Example: 4 × 7 = 28

4. Activity lesson 1
Write these problems:
20,000 x 7=140,000
5 x 4,000=20,000
300,000 x 8=2,400,000
Draw a box around the basic fact.
Underline the zeros in the factor and the product.
Do this for the next two problems.

5. Math Buddy/Independent work:
If you finish early:
Complete the other problems on p. 131
Answer EQ in your journal
Practice multiplication facts in journal
Complete a math folder
Read a math book

6. EQ – 4.2
How can you estimate products by rounding a factor and then finding the product mentally?

7. Review Vocabulary:
estimate- to find an answer that is close to the exact amount. Example: round – to replace a number with another number that tells about how many or how much. Example:

8. Remember: Rounding: Find your number, Look next door.
Add ONE more:
5, 6, 7, 8, 9
Remember:
Find your number,
Look next door.
4 or less, just ignore.
5 or more, ADD one more!
Just IGNORE:
4, 3, 2, 1, 0

9. Activity lesson 2 Estimate 3 x 215 (highest place value-nearest 100)
You can use a number line to help you round.
215 rounded to the nearest 100 is
Try another: 4 x 365
200
250
300
200

10. Math Buddy/Independent work:
If you finish early:
Complete the other problems on p. 134
Answer EQ in your journal
Practice multiplication facts in journal
Complete a math folder
Read a math book

11. EQ – 4.3
How can you represent multiplication by using rectangular models and base- ten blocks?

12. Vocabulary:
partial product - A method of multiplying in which ones, tens, hundreds, and so on, are multiplied separately and then the products are added together Example:

13. Math Buddy/Independent work:
If you finish early:
Complete the other problems on p. 139
Answer EQ in your journal
Practice multiplication facts in journal
Complete a math folder
Read a math book

14. EQ – 4.4
How can you model and record the products of 2-digit and 1-digit numbers?

15. Activity lesson 4 Write 4 x 24
Remember we can find the product by breaking apart the 2-digit number and multiplying the simpler numbers.
Which number is greater in 4 x 24?
Model 4 x 24
Try this:
Multiply 2 tens by 4
Multiply 4 ones by 4
Regroup the ones.
Add the tens & ones to find the product. 24
x 4 80 +4 84

16. Math Buddy/Independent work:
If you finish early:
Complete the other problems on p. 143
Answer EQ in your journal
Practice multiplication facts in journal
Complete a math folder
Read a math book

17. EQ – 4.5
How can you use place value and regrouping to find products of 2-digit and 1-digit numbers?

18. Activity lesson 5 47 x 3 2. What is 3 x 7?
1. Write
2. What is 3 x 7?
3. Let’s write this in our problem. 47
x 3 2 47
x 3 1
I put the 1 in the ones place, under the 7 and the 3. I put the 20 or 2 over the tens place above the problem.

19. Activity lesson 5 cont. 4. What’s next? 5. Try one on your own! 47 x 32 47
x 3
141
I multiply 3 x 4 tens, which is 12 tens. Then I add the regrouped 2 tens =14 35
x 6

20. Math Buddy/Independent work:
If you finish early:
Complete the other problems on p. 148
Answer EQ in your journal
Practice multiplication facts in journal
Complete a math folder
Read a math book

21. Essential Question – 4.6
How does drawing a diagram help you solve multiplication problems?

22. Activity lesson 6
A theatre has 5 rows of 9 seats. Three seats in the middle of the first two rows are more expensive than the other seats. How many of the less expensive seats are there?
Arrange 5 rows of 9 counters with yellow side facing up.

23. Activity lesson 6 cont.
A theatre has 5 rows of 9 seats. Three seats in the middle of the first two rows are more expensive than the other seats. How many of the less expensive seats are there?
Multiply the total number of seats. Check your work.
Show the seats
that are more
expensive by
flipping over those
counters.
How many seats are more expensive?
How many seats are the cheaper ones?

24. Math Buddy/Independent work:
If you finish early:
Answer EQ in your journal
Practice multiplication facts in journal
Complete a math folder
Read a math book

25. Essential Question – 4.7
How can you use base-ten blocks to model 3-digit multiplication?

26. Math Buddy/Independent work:
If you finish early:
Answer EQ in your journal
Practice multiplication facts in journal
Complete a math folder
Read a math book

27. Essential Question – 4.8
What methods can you use to find and record products of 3-digit and 1-digit numbers?

28. Math Buddy/Independent work:
If you finish early:
Complete the other problems on p. 161
Answer EQ in your journal
Practice multiplication facts in journal
Complete a math folder
Read a math book

29. Essential Question – 4.9
How can you find and record products of multi- digit and 1-digit numbers?

30. Math Buddy/Independent work:
If you finish early:
Complete the other problems on p. 161
Answer EQ in your journal
Practice multiplication facts in journal
Complete a math folder
Read a math book

31. Essential Question – 4.10
How can you find and record products of numbers with zeros?

32. Math Buddy/Independent work:
If you finish early:
Complete the other problems on p. 161
Answer EQ in your journal
Practice multiplication facts in journal
Complete a math folder
Read a math book

33. Essential Question – 4.11
What methods can you use to multiply by 1-digit numbers?

34. Math Buddy/Independent work:
If you finish early:
Complete the other problems on p. 161
Answer EQ in your journal
Practice multiplication facts in journal
Complete a math folder
Read a math book