Ivory spent less than $130. 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 Ivory left to spend on the 2 items
= 130 - 23.60
= $106.40
Round off each number to the nearest tens for a more accurate estimation.
(a) Aeroplane: $46.40 ≈ $50
(b) Blocks: $33.70 ≈ $30
(c) Teddy bear: $35.60 ≈ $40
(d) Lego: $69.50 ≈ $70
30 + 70 = 90
90 is nearest to 106.40.
Total amount spent on the two items
= 33.70 + 69.50
= $103.20
To use up all her money to buy another 2 items, she cannot exceed $106.40.
The total amount of $103.20 is nearest to and less than $106.40.
So, Ivory bought (b) Blocks and (d) Lego.
Answer(s): (a) b, d; (b) $103.20