NationalEasyNumbers & Operations5–6

Estimating a Shopping Bill

Estimar a Conta das Compras

At the supermarket Tomás buys four items costing € $4.85$ , € $12.30$ , € $7.60$ and € $2.95$ . Before paying he wants a quick estimate of the total by rounding each price to the nearest euro. What estimate does he get, and by how much does it differ from the exact total?

Round each price on its own before adding anything, and keep the exact sum aside to compare at the end.

Solution

Step 1 of 5

1.Rounded prices: $4.85 \to 5$ , $12.30 \to 12$ , $7.60 \to 8$ , $2.95 \to 3$ .