6 — Rounding and Estimation

Rounding and Estimation

Solution & Explanation · ID: A15E24FD

Question

You have $15. Can you buy a book for $7.85 and a snack for $5.20? Use estimation to decide.

Hint

Round the prices to make them easier to add mentally.

Concept

Use estimation to quickly determine if you have enough money by rounding prices to convenient amounts.

Show Answer

Yes

Show Solution
1

Round the book price: $7.85 ≈ $8.00

2

Round the snack price: $5.20 ≈ $5.00

3

Add the estimated costs: $8.00 + $5.00 = $13.00

4

Compare to available money: $13.00 < $15.00, so YES, you can buy both items

Visual showing $15.00 at the top. Below shows book $7.85 → $8.00 and snack $5.20 → $5.00 with arrows. Addition shows $8.00 + $5.00 = $13.00. Final comparison $13.00 < $15.00 with checkmark and 'YES' in green.