1. Multiplying 2-digit by 1-digit numbers
Lesson 5.6
Multiplying 2-digit by 1-digit numbers

2. Homework Check – Pg. 98 (#7-20)

3. Review
4 x 80 =
6 x 200 =
7 x 90 =
30 x 6 =

4. Review – Break Apart! 42 x 4 = (_____ x 4) + (_______ x 4) 35 x 3 =

5. Set the purpose
You have learned how to use the “breaking apart” method. Today you will learn another way to do multiplication.

6. Pose the Problem
A school ordered 7 boxes of books. There are 25 books in each box. How can you use paper and pencil to find how many books there are altogether?

7. Together
Multiply.
34 x 8 =
45 x 3 =
19 x 5 =

8. On your own
Multiply.
12 x 8 =
24 x 2 =
73 x 6 =

9. Word Problems How many blue t-shirts are in 4 boxes?
Number of T-shirts per box
Color of T-shirt 45
Red 35
Blue 40
Orange 27
Green
How many blue t-shirts are in 4 boxes?
How many orange t-shirts are in 7 boxes?

10. Word Problems How many red t-shirts are in 3 boxes?
Number of T-shirts per box
Color of T-shirt 45
Red 35
Blue 40
Orange 27
Green
How many red t-shirts are in 3 boxes?
How many green t-shirts are in 3 boxes?
How many more red t-shirts are there than green t-shirts in 3 boxes?

11. Word Problems
Average rate of growth per month
5 mm
Fingernails
12 mm
Hair
What is the average length fingernails will grow in one year?

12. Word Problems Average rate of growth per month
5 mm
Fingernails
12 mm
Hair
How much longer will hair grow than fingernails in one year?

13. Homework
Pg. 111 (#12-19)

14. Extra Practice

15. Extra Practice