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primary 5 | Maths
| Whole Numbers
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Date Posted: 5 years ago
Views: 429
(a)
4 erasers + 8 pens cost $5.20
36 erasers + 72 pens cost $5.20x9 = $46.80
17 erasers + 9 pens cost $10.85
136 erasers + 72 pens cost $10.85x8 = $86.80
hence,
36 erasers + 72 pens cost $46.80
136 erasers + 72 pens cost $86.80
136-36 erasers cost $86.80 - 46.80 100 erasers cost $40.00
(b)
ans: 100 erasers
4 erasers + 8 pens cost $5.20
36 erasers + 72 pens cost $5.20x9 = $46.80
17 erasers + 9 pens cost $10.85
136 erasers + 72 pens cost $10.85x8 = $86.80
hence,
36 erasers + 72 pens cost $46.80
136 erasers + 72 pens cost $86.80
136-36 erasers cost $86.80 - 46.80 100 erasers cost $40.00
(b)
ans: 100 erasers
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