Post on 17-Aug-2020
1 Adding and Subtracting with Decimals.notebook
1
January 09, 2015
Oct 3011:40
Reintroduction to Decimals
L.O.• all pupils can remember what a decimal is
• all pupils can add decimals• most pupils can subtract decimals
• some pupils can predict what will happen when multiplying with decimals
Oct 3011:40
What is a decimal?
Main 1: what a decimal is
Oct 3011:41
Tell me 5 facts about this number
10.71304
Main 1: what a decimal is
Oct 3011:40
Which of these numbers is bigger?0.1 or 0.30.01 or 0.0030.72 or 0.80.5 or 0.40
Put the numbers on a number line to check your answers
Main 1: what a decimal is
Oct 3011:40
Reintroduction to Decimals
L.O.• all pupils can remember what a decimal is
• all pupils can add decimals• most pupils can subtract decimals
• some pupils can predict what will happen when multiplying with decimals
Oct 3011:41
Main 2: add decimals
How would you add the numbers 3491 and 442?
1 Adding and Subtracting with Decimals.notebook
2
January 09, 2015
Oct 3011:41
Main 2: add decimals
So how do you think you would add the numbers 3.491 and
4.42?
Oct 3011:41
Main 2: add decimals
Using the same method add these decimal numbers together:
Oct 3011:41
Main 2: add decimals
Using the same method add these decimal numbers together:
Oct 3011:41
Main 2: add decimals
Using the same method add these decimal numbers together:
Oct 3011:41
Main 2: add decimals
On you IWB, answer these decimal addition questions...
Oct 3011:40
Reintroduction to Decimals
L.O.• all pupils can remember what a decimal is
• all pupils can add decimals• most pupils can subtract decimals
• some pupils can predict what will happen when multiplying with decimals
1 Adding and Subtracting with Decimals.notebook
3
January 09, 2015
Oct 3011:41
Main 3: subtract decimals
How would you subtract the numbers 3491 and 442?
Oct 3011:41
Main 3: subtract decimals
So how do you think you would subtract the numbers 3.491 and
4.42?
Oct 3011:41
Using the same method subtract these decimal numbers:
Main 3: subtract decimals
Oct 3011:41
Using the same method subtract these decimal numbers:
Main 3: subtract decimals
Oct 3011:41
Using the same method subtract these decimal numbers:
Main 3: subtract decimals
Oct 3011:41
Main 3: subtract decimals
On you IWB, answer these decimal subtraction questions...
1 Adding and Subtracting with Decimals.notebook
4
January 09, 2015
Oct 3011:40
Reintroduction to Decimals
L.O.• all pupils can remember what a decimal is
• all pupils can add decimals• most pupils can subtract decimals
• some pupils can predict what will happen when multiplying with decimals
Oct 3011:41
Main 4: multiplying with decimals
What do you think will happen when 5 is multiplied by 0.5?
What do you think will happen when 5 is divided by 0.5?
What is 5 + 0.5?
What is 5 - 0.5?
Oct 3011:41