Day 5 Adding and subtracting fractions · 2020. 3. 27. · Day 5 –Adding and subtracting...
Transcript of Day 5 Adding and subtracting fractions · 2020. 3. 27. · Day 5 –Adding and subtracting...
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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.
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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
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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
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How quickly can you complete the times table challenge?
Try timing yourself and keep trying to beat your score to become an expert!
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Answers!
How did you do? Now try again to beat your score!
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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.
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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.
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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
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To add and subtract fractions you only need to add the numerator.
The denominator stays the same.
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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=
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3 and 4 are both factors of 12 – we can therefore make the denominator 12 by multiplying the fractions.
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Once you have the same denominators – you can add the numerators as usual!
Don’t forget to simplify!
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Please visit:
https://www.math-salamanders.com/adding-subtracting-fractions.html
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Practise your skills – complete the fraction pyramids.
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Practise your skills – complete the fraction pyramids.
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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)
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Reasoning Questions – choose your challenge!
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Answers:
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Problem solving Questions – choose your challenge!
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Answers:
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Test Question
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Test Question
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Test Question - answers
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Extension (optional)
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Extension (answer)