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primary 6 | Maths | Fractions
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Cindy
Cindy

primary 6 chevron_right Maths chevron_right Fractions chevron_right Singapore

I need help. Thank you.

Date Posted: 5 years ago
Views: 238
J
J
5 years ago
Total bookmarks = 160 x 3 = 480
Ken has 36 bookmarks

Ahmad's bookmarks = 4 x (Oliver + Ken)
Let Oliver's bookmarks be 1 unit

Ahmad's bookmarks = 4 x (1 unit + 36)
= 4 units + 144

Total = Ahmad + Oliver + Ken
= 4 units + 144 + 1 unit + 36
= 5 units + 180

5 units + 180 = 480

5 units = 300
1 unit = 300 ÷ 5 = 60

Difference of Ahmad and Oliver
= 4 units + 144 - 1 unit
= 3 units + 144
= 3 x 60 + 144
= 180 + 144
= 324
Cindy
Cindy
5 years ago
Thank you very much.
J
J
5 years ago
Welcome

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TJHK
Tjhk's answer
53 answers (A Helpful Person)
1st
The average: 160
Total number of pupils: 3
*Technique: Find the total number of bookmarks first.

Careful of:
*When drawing of model, do not draw 3 bars as we do not know how many units is for Ken and Oliver individually. So, since we know the total units of Ken and Oliver, just draw them in 1 bar, 1 unit.
Cindy
Cindy
5 years ago
Thank you very much.