Day 5 – Adding and subtracting fractionsSuccess Criteria
I can add and subtract fractions with the same denominator
I can add and subtract fractions with different denominators by
changing one fraction
I can add and subtract fractions with different denominators by
changing both fractions.
DNA How many facts can you give about
the fraction 9
12?
Consider simplifying, ordering and comparing.
Retrieval questions
How many lines of symmetry does an octagon have?
List 3 prime numbersbetween 15 and 30
Find the mean of thesenumbers: 32, 34, 23, 38.
How do you find the area of a rectangle?
How many grams in a kilogram?
List the factors of 12
1 HP
2 HPs
3 HPs
Retrieval questions
How many lines of symmetry does an octagon have? 8
List 3 prime numbers between 15 and 30
17, 19, 23, 29 (4 possible answers)
Find the mean of thesenumbers: 32, 34, 23, 38. 31.75
How do you find the area of a rectangle? Length X Width
How many grams in a kilogram?1000 g
List the factors of 121, 12, 2, 6, 3, 4
1 HP
2 HPs
3 HPs
How quickly can you complete the times table challenge?
Try timing yourself and keep trying to beat your score to become an expert!
Answers!
How did you do? Now try again to beat your score!
Daily questions
87,345 – 38,590 =
15
20-6
20=
3. Jake and Samir timed themselves to find out how long it took them to run 1km. Jake took 5 minutes and 35 seconds. Samir took 300 seconds. Who was the quickest? Explain how you know.
1.
2.
Daily questions
87,345 – 38,590 =
15
20-6
20= Solutions
1. 48,755
2.9
20
3. Samir: 300 ÷ 60 = 5 so Samir only took 5 minutes, which is quicker than Jake.
3. Jake and Samir timed themselves to find out how long it took them to run 1km. Jake took 5 minutes and 35 seconds. Samir took 300 seconds. Who was the quickest? Explain how you know.
1.
2.
Write the definitions of the words as we come across them today – can you think of an example question for the word?
Word Definition Example
Greater
Less
To add and subtract fractions you only need to add the numerator.
The denominator stays the same.
If the denominators are different, you need to first make sure they are the same by finding a common multiple (just like when we ordered fractions
on Tuesday and Wednesday).
𝟐
𝟑+
𝟑
𝟒=
3 and 4 are both factors of 12 – we can therefore make the denominator 12 by multiplying the fractions.
Once you have the same denominators – you can add the numerators as usual!
Don’t forget to simplify!
Please visit:
https://www.math-salamanders.com/adding-subtracting-fractions.html
Practise your skills – complete the fraction pyramids.
Practise your skills – complete the fraction pyramids.
From the activity you just completed – please choose an
activity from the following resources.
They are labelled with the chilli challenge.
Remember – if you find it too easy, move on to the next challenge.
Use your wobble moment!(Answers follow)
Reasoning Questions – choose your challenge!
Answers:
Problem solving Questions – choose your challenge!
Answers:
Test Question
Test Question
Test Question - answers
Extension (optional)
Extension (answer)
