Download presentation

Presentation is loading. Please wait.

Published byRyan Rogers Modified over 4 years ago

1
We are learning to find percentages of 3 digit numbers.

2
What does % mean? per cent for every 100

3
To find 1% of a number ÷ by 100 Find 1% of 225 225 ÷ 100 (move all digits 2 places to the right) 225. 1% of 225 =. 225

4
To find 10% of a number ÷ by 10 Find 10% of 376 376 ÷ 10 (move all digits 1 place to the right) 376. 10% of 376 =.376

5
Can we use this information To find 11% of a number? 10% + 1% = 11%

6
Find 11% of 352 352 ÷ 100 = 352. 3. 5 2 352 ÷ 10 = 3.52 352. 3. 5 2 35.2 3.52 35.2 + 27. 83

7
Find 2% of 453 1% of 453 453 ÷ 100 =4.53 1% x 2 = 2% 4.53 x 2 60 1 9 2 x 3 = 6 2 x 5 = 10 (carry the 1) 2 x 4 = 8 + 1 = 9 The decimal point goes between the 9 and the 0. There are 2 digits after the decimal point in the sum so we need 2 digits after the decimal point in the answer. 2% of 453 =

8
Use these methods to find 12% of 563 Hint: add together 10%, 1% and 1% 56.3 + 5.63 + 5.63 = 16% of 285 Hint: add together 10%, 6 x 1% 28.5 + (6 x 2.85) =

9
Can you find 20% of 621? Hint: 20% = 10% + 10% or 10% x 2 621 ÷ 10 = 62.1 + x 2 124.2 20% of 621 = 124.2

Similar presentations

Presentation is loading. Please wait....

OK

MATHS FACTS YOU NEED TO KNOW

MATHS FACTS YOU NEED TO KNOW

© 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

Ppt on collection in java Ppt on rational numbers for class 10 Ppt on history of badminton and rules Ppt on event driven programming concept Ppt on light dependent resistor Ppt on regular expression in php Mp ppt online viewer Animated ppt on human digestive system Ppt on wireless network architecture Ppt on business planning process