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primary 6 | Maths
| Fractions
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Can anyone pls help me with questions 1 and 2 ASAP. Thanks
Date Posted: 4 years ago
Views: 327
1 - 1/3 = 2/3
2/3 are apples.
Number of apples = 72 x 2/3 = 48
⅜ of apples are green.
Green apples = ⅜ x 48 = 18
2/3 are apples.
Number of apples = 72 x 2/3 = 48
⅜ of apples are green.
Green apples = ⅜ x 48 = 18
Thx alot
Welcome. Actually the concept behind your working is correct. Just that you should look at the fraction that are apples instead of pears.
Here's how it should be :
1 - ⅓ = ⅔
⅔ = 8/12
12 units = 72
1 unit = 72 ÷ 12 = 6
Green apples = 3 units
= 3 x 6
= 18
Here's how it should be :
1 - ⅓ = ⅔
⅔ = 8/12
12 units = 72
1 unit = 72 ÷ 12 = 6
Green apples = 3 units
= 3 x 6
= 18
Question 2 is essentially the same as question 1.
1 - ⅓ = ⅔
⅔ of the fruits are apples.
⅔ x 72 = 48
There are 48 apples.
Fraction of apples that are green
= 18/48
= 3/8
Alternative working :
Fraction of all fruits that are green apples
= 18/72
= ¼
Fraction of all fruits that are apples
= 1 - ⅓ = ⅔
Fraction of apples that are green
= fraction of all fruits that are green apples/fraction of all fruits that are apples
= ¼ ÷ ⅔
= ¼ x 3/2
= 3/8
This method utilises division of fractions. Although this has been removed from the syllabus, it's worth to learn it and might come in useful in PSLE.
1 - ⅓ = ⅔
⅔ of the fruits are apples.
⅔ x 72 = 48
There are 48 apples.
Fraction of apples that are green
= 18/48
= 3/8
Alternative working :
Fraction of all fruits that are green apples
= 18/72
= ¼
Fraction of all fruits that are apples
= 1 - ⅓ = ⅔
Fraction of apples that are green
= fraction of all fruits that are green apples/fraction of all fruits that are apples
= ¼ ÷ ⅔
= ¼ x 3/2
= 3/8
This method utilises division of fractions. Although this has been removed from the syllabus, it's worth to learn it and might come in useful in PSLE.
Thx for your help
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So originally there are 3 units (total) of fruits. 2 of these units is equivalent to 8 units (represent all apples).
Hence you can see that the original 2 units can actually be cut into 8 units.. by simply x4.
Hence 3 original units can be cut into a total of 12 units.
And hence the subsequent steps to find the number of green apples
Hence you can see that the original 2 units can actually be cut into 8 units.. by simply x4.
Hence 3 original units can be cut into a total of 12 units.
And hence the subsequent steps to find the number of green apples
Date Posted:
4 years ago
Thx alot
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