Download presentation

Presentation is loading. Please wait.

Published byRodney Frankum Modified over 3 years ago

2
Partial Products Multiplication How to multiply multi- digit numbers

3
What is a partial product? / Partial means part of and when we use this method, we are breaking the numbers or factors into smaller parts--I am calling them chunks because you are familiar with that term from reading! But we are working with a smaller part first before we put the factors all together to find the product. Can you see the word part in partial?

4
What do I do first? / When multiplying with multi-digits, the first thing we want to do is use expanded notation to break down the numbers or factors into smaller chunks. This helps us do one piece at a time. / For example, let’s break down the top number in this number sentence: / 543 can be expanded to 500 + 40 + 3 / x 3 / When multiplying with multi-digits, the first thing we want to do is use expanded notation to break down the numbers or factors into smaller chunks. This helps us do one piece at a time. / For example, let’s break down the top number in this number sentence: / 543 can be expanded to 500 + 40 + 3 / x 3

5
Step 2 / You will want to set up the problem vertically and make sure to include the bottom number with each chunk of the expanded number. / For example, 543 x 3 should look like this: / 500+ 40+ 3 / X 3 x3 x 3 / You will want to set up the problem vertically and make sure to include the bottom number with each chunk of the expanded number. / For example, 543 x 3 should look like this: / 500+ 40+ 3 / X 3 x3 x 3

6
Step 3 / Do the work of multiplying each chunk. You can work from the left to the right or the right to the left. / 500+ 40 + 3 X 3 x3 x3 1500 120 9 / Do the work of multiplying each chunk. You can work from the left to the right or the right to the left. / 500+ 40 + 3 X 3 x3 x3 1500 120 9

7
Step 4 / Now you will add all the chunks or partial products together. Make sure you are aligning the numbers with the correct place value spacing: / 1500 / 120 / + 9 1629 / Now you will add all the chunks or partial products together. Make sure you are aligning the numbers with the correct place value spacing: / 1500 / 120 / + 9 1629

8
Step 5 / Check your work! / 1. Did you add all the parts? Did you add them all correctly? / 2. Are your place values aligned correctly? / These two points are very important and usually where any mistakes are made. / Check your work! / 1. Did you add all the parts? Did you add them all correctly? / 2. Are your place values aligned correctly? / These two points are very important and usually where any mistakes are made.

9
Step 6 / Did you know you can ALSO check your work by using the traditional method of multiplying? / ‘543 / X 3 / 1629 / Did you know you can ALSO check your work by using the traditional method of multiplying? / ‘543 / X 3 / 1629

10
Let’s try this again / Remember, we want to use expanded notation first. / 658 will look like this 600 + 50 + 8 / x5 / Now we want to set up the problem like this: / 600 + 50 + 8 / X 5 x5 x5 Now do the multiplying! / 3000 + 250 + 40 = 3290 / Remember, we want to use expanded notation first. / 658 will look like this 600 + 50 + 8 / x5 / Now we want to set up the problem like this: / 600 + 50 + 8 / X 5 x5 x5 Now do the multiplying! / 3000 + 250 + 40 = 3290

11
How did you do? / Are you ready to try it on your own? / Of course, you can work with a table buddy if you’d prefer… / Are you ready to try it on your own? / Of course, you can work with a table buddy if you’d prefer…

Similar presentations

Presentation is loading. Please wait....

OK

Module 4 Lesson 23.

Module 4 Lesson 23.

© 2018 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google