Multiplying problems with multi - digits

I can multiply multi-digit numbers using whole numbers.

Essential Questions

What are whole numbers? How do you multiply multi-digit whole numbers?

What is a Place Holding Zero? Why do you use a Place Holding Zero?

What is estimation? Why should you use it to determine the reasonableness of your answer?

Review Time!!

As you all know... we have been working on new strategies for multiplying multi-digit problems.

Please get out your slates and be ready in 10...9...8...

I am going to put a problem on the screen. You will then write what type of strategy is being used.

Tens Ones

7 1

Tens 2

Ones 9

+

+

+++

+=

== = =

=

20 x 701400

20 x 120

1400 + 20 = 1420

630 + 9 = 639

20 + 9 = 29

1 x 99

1400 + 630 = 2030

70 x 9630

2059

Lattice!!

WHAT IS THIS STRATEGY?

What is this strategy?

34x 23

1

102086+

782

Standard

Now that were refreshed...

It is important to know these strategies as TOOLS!

If they do not help you, then do what works best for YOU!

Let’s practice a few together...

1,763 x 9 =

342 x 76 =

78 x 63 =

15,867

25,992

4,914

Math Review (You Do)

(1) 1, 234 x 9

(2) 234 x 34

(3) It is the beginning of school, and each teacher has bought 130 notebooks for their classes. If they are going to have 26 students, how many notebooks does each child get?

(4) 23 x 8

(5) 34,567 x 7

closure

Please write on your slate 2 things you are going to do in order to get 100 % on the formative.

Be ready to share.