Download presentation

Presentation is loading. Please wait.

Published byMia miah Blackmon Modified over 2 years ago

1
Starter However you like, multiply out: 11 x 25 11 x 71 11 x 34 11 x 42 11 x 1411 x 83

2
Percentages Lesson Objective: To calculate the percentage of an amount WITHOUT a calculator. Success Criteria Divide by 10 Find 10%, 20%, 30% etc. Know how to find 5%, 1% and combinations Friday May 9 2014

3
What will we learn today? A question about today’s lesson you would like answered Two things I know already Three new things I have learned To be completed at THE END NAME:_____________

4
Why do we need to know percentages of amounts?

5
To calculate percentages: We need to make sure we can divide by 10. 350 ÷ 10 9000 ÷ 10 62900 ÷ 10 30 ÷ 10 7 ÷ 10 21.2 ÷ 10

6
Percentages of Amounts Example: How can you calculate 10% of 80? 100% = 80 10% = 8 ÷ 10

7
Finding 10% of a number 10 % is the same as dividing by 10. On your own: a)10% of 350 kg = b)10% of 20 L = c)10% of 10 000 hours = d)10% of £900?

8
Percentages of Amounts On your own… (a) (b) 10% (c) OR Move decimal point one left ÷ 10 10% of £40 10% of $180 10% of £57(d) 10% of £472 (e) (f) (g) 20% of 50m 20% of 190km 30% of 40cm(h) 30% of 90mm (i) (j) (k) 40% of 80min 60% of 70hours 80% of 20days(l) 90% of 30years = £4 = $18 = £5.70 = £47.20 10% = 5m 10% = 5m 10% = 19km 10% = 19km 10% = 4cm 10% = 4cm 10% = 9mm 10% = 9mm x4 10% = 8min 40% = x4 32min x6 10% = 7hours 60% = x6 42hours x8 10% = 2days 80% = x8 16days x9 10% = 3years 90% = x9 27years 10% = 4cm 10% = 9mm

9
Percentages of Amounts If you can find 10% of a number, you can find 5% and 1% How?

10
Percentages of Amounts Example: Find 5% of 140 100% = 140 10% = 5% = 14 7 ÷ 10 ÷ 2

11
Percentages of Amounts Example: Find 1% of 1500 100% = 1500 10% = 150 1% = 15 ÷ 10

12
Can you use this information to find: 12% of 1800? 10% = 180 1% = 18 12% = 10% + 1% + 1% 12% = 180 + 18 + 18 12% = 216

13
Can you use this information to find: 35% of 280 10% = 28 5% = 14 35% = 10% + 10% + 10% + 5% 35% = 28 + 28 + 28 + 14 35% = 98

14
Core KILLER 1) 28% of £200 = 2) 63% of £500 = 3) 19% of £400 = 4) 37% of £80 = 5) 82% of £54 = 6) 51% of £40 = 7) 4% of £90 = 8) 23% of £6 = 1)10% of £80 = 2)10% of £130 = 3)10% of £36 = 4)20% of £60 = 5)20% of £62 = 6)30% of £70 = 7)30% of £180 = 8)40% of £360 = Extension 1)62% of £90 = 2)71% of £410 = 3)85% of £40 = 4)90% of £800 = 5)5% of £1480 = 6)35% of £80 = 7)45% of £90 = 8) 15% of £400 = Independent Task

15
How can we use this today?

16
Sales Tax

17
Percentages Lesson Objective: To calculate the percentage of an amount WITHOUT a calculator. Success Criteria Divide by 10 Find 10%, 20%, 30% etc. Know how to find 5%, 1% and combinations Friday May 9 2014

18
What will we learn today? A question about today’s lesson you would like answered Two things I know already Three new things I have learned

Similar presentations

Presentation is loading. Please wait....

OK

“A man with a watch knows what time it is

“A man with a watch knows what time it is

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on success and failure articles Ppt on nitrogen cycle and nitrogen fixation is carried Ppt on rational numbers for class 8 free download Ppt on column chromatography videos Ppt on odisha cultures Ppt on toyota production system Ppt on fibonacci numbers in nature Ppt on computer languages 2015 Ppt on business environment nature concept and significance definition Ppt on earth dam stability