Usha spent less than $120. She already bought a toy helicopter at $27.70. 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 Usha left to spend on the 2 items
= 120 - 27.70
= $92.30
Round off each number to the nearest tens for a more accurate estimation.
(a) Aeroplane: $53.70 ≈ $50
(b) Blocks: $31.70 ≈ $30
(c) Teddy bear: $37.10 ≈ $40
(d) Lego: $55.60 ≈ $60
50 + 40 = 90
90 is nearest to 92.30.
Total amount spent on the two items
= 53.70 + 37.10
= $90.80
To use up all her money to buy another 2 items, she cannot exceed $92.30.
The total amount of $90.80 is nearest to and less than $92.30.
So, Usha bought (a) Aeroplane and (c) Teddy Bear.
Answer(s): (a) a, c; (b) $90.80