Cathy spent less than $120. She already bought a toy helicopter at $23.60. 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 - 23.60
= $96.40
Round off each number to the nearest tens for a more accurate estimation.
(a) Aeroplane: $53.20 ≈ $50
(b) Blocks: $28.80 ≈ $30
(c) Teddy bear: $41.20 ≈ $40
(d) Lego: $64.70 ≈ $70
50 + 40 = 90
90 is nearest to 96.40.
Total amount spent on the two items
= 53.20 + 41.20
= $94.40
To use up all her money to buy another 2 items, she cannot exceed $96.40.
The total amount of $94.40 is nearest to and less than $96.40.
So, Cathy bought (a) Aeroplane and (c) Teddy Bear.
Answer(s): (a) a, c; (b) $94.40