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Question
primary 6 | Maths
| Fractions
One Answer Below
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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
See 1 Answer
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.