Multiply with Expanded Form

Presentation

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Mathematics

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4th Grade

•

Easy

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CCSS

4.NBT.B.5, 1.NBT.A.1, 2.NBT.A.3

Standards-aligned

Sophia Lukatya

Used 20+ times

FREE Resource

7 Slides • 5 Questions

Multiply with Expanded Form

(it is basically the same thing as using the distributive property)

So far we have learned how to....

Use the distributive property to break apart factors
4 x 12 as (4x10) + (4x2)
Using the expanded form is pretty much the same thing. We just use it with even bigger numbers

Multiple Choice

What is expanded form for the number 17?

10 + 7

1 + 7

Multiple Choice

What is 147 in expanded form?

1+4+7

100+40+7

Now we can use expanded form to multiply bigger numbers!!!

4 x 212

212= 200 + 10 + 2
(4x200) + (4x10) + (4x2)
(800) + (40) + (8)
848

Multiple Choice

Which shows how you can break up 2 x 43?

(2x4) + (2x3)

(20) +(6)

Multiple Choice

What is the product of 2 x 43?

Using the expanded form to multiply

Think of the number in expanded form
Multiply the other factor with the value of the first digit
Continue multiplying
Add them all up

6 x 351

351 = 300 + 50 + 1 (expanded from)
(6 x300) + (6x50) +(6x1)
(1800)+(300)+(6)
1800+300= 2100 (think 18 +3 = 21)
2100+6= 2106
2106

3 x 363

363= 300 +60 +3
(3 x 300) + (3 x 60) + (3 x 3)
(900) + (180) + (9)
900 + 180 = 1,080
1,080+ 9 = 1,089
1,089

Multiple Choice

5 x 234

1170

1002

Multiply with Expanded Form

(it is basically the same thing as using the distributive property)

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