Cathy spent less than $120. She already bought a toy helicopter at $33.60. She tried to use up all her money and bought another two items.
- Name the two items. Give your answers in letters. (Eg a, b)
- What was the total cost for the two items?
(a)
Estimated amount that Madam Cathy left to spend on the 2 items
= 120 - 33.60
= $86.40
Round off each number to the nearest tens for a more accurate estimation.
(a) Cube: $17.50 ≈ $20
(b) Guitar: $53.10 ≈ $50
(c) Cushion: $32.40 ≈ $30
(d) Ball: $39.90 ≈ $40
50 + 30 = 80
80 is nearest to 86.40.
Total amount spent on the two items
= 53.10 + 32.40
= $85.50
To use up all her money to buy another 2 items, she cannot exceed $86.40.
The total amount of $85.50 is nearest to and less than $86.40.
So, Cathy bought (b) Guitar and (c) Cushion.
Answer(s): (a) b, c; (b) $85.50