Download presentation

Presentation is loading. Please wait.

1
**Multiplying Large Numbers (Traditional Method)**

Created by: Sabrina Edmondson Adapted from BBC online

2
**Multiplying Large Numbers**

If this method seems familiar it might be because you were encouraged to use it in school. Talking through the method is far easier than trying to follow written instructions.

3
**Multiplying Large Numbers**

Have a look at how the equation 235 x 5 can be worked out using this method. Step 1: 5 x 5 = 25. Put the 5 in the units column, and carry the 2 to the tens. H T O 2 3 5 x

4
**Multiplying Large Numbers**

Step 2: 3 x 5 = 15. Add the 2 makes 17. 7 goes into the ten’s column and carry the 1 to the hundred’s column. H T O 1 2 3 5 x 7

5
**Multiplying Large Numbers**

Th H T O 1 2 3 5 x 1 1 7 Step 3: 5 x 2 = 10. Add the carried 1 makes 11. So: 235 x 5 = 1,175

6
**Multiplying Large Numbers**

Remember to line up the ones, tens and hundreds underneath each other.

7
**Multiplying Large Numbers**

Now have a look at the equation: 255 x 25 H T O 2 5 x

8
**Multiplying Large Numbers**

First, multiply 255 by the unit digit 5. Step 1: 5 x 5 = 25. Put the 5 in the units column, and carry the 2 to the tens H T O 2 5 x

9
**Multiplying Large Numbers**

Step 2: 5 x 5 = 25. Add the 2 makes goes into the tens column and carry the 2 to the hundred’s column. H T O 2 5 x 7

10
**Multiplying Large Numbers**

Step 3: 5 x 2 = 10. Add the carried 2 makes 12. Th H T O 2 5 x 1 2 7

11
**Multiplying Large Numbers**

Then multiply 255 by the ten’s digit 2. Remember to place a zero in the ones column first when multiplying the tens. Th H T O 2 5 x 1 2 7

12
**Multiplying Large Numbers**

Th H T O 1 2 5 x 1 2 7 Step 1: 2 x 5 = 10. Put the 0 in the ten’s column, and carry the 1 to the hundreds.

13
**Multiplying Large Numbers**

Step 2: 2 x 5 = 10. Add the carried 1 makes goes into the hundred’s column, with 1 carried to the thousands. Th H T O 1 2 5 x 1 2 7

14
**Multiplying Large Numbers**

Step 3: 2 x 2 = 4, add the carried 1 makes 5. The total is 5,100. Th H T O 1 2 5 x 1 2 7 5 1

15
**Multiplying Large Numbers**

Finally, add down the columns down to get the total. Th H T O 1 2 5 x 1 2 7 5 1 6 3 So: 255 x 25 = 6,375

16
**Multiplying Large Numbers**

Remember: Keep the numbers in columns - ones, tens, hundreds etc. When multiplying the tens digit add a zero to the ones column first.

Similar presentations

OK

To be able to use partitioning to double or halve numbers.

To be able to use partitioning to double or halve numbers.

© 2018 SlidePlayer.com Inc.

All rights reserved.

To ensure the functioning of the site, we use **cookies**. We share information about your activities on the site with our partners and Google partners: social networks and companies engaged in advertising and web analytics. For more information, see the Privacy Policy and Google Privacy & Terms.
Your consent to our cookies if you continue to use this website.

Ads by Google

Knowledge based view ppt on android Ppt on statistics in maths class Ppt on resistance temperature detector Ppt on charge-coupled device images Ppt on historical places in hyderabad Free ppt on emotional intelligence Ppt on new product development steps Ppt on iso 9000 certification Ppt on fibonacci numbers and the golden Ppt on aircraft noise reduction technology