PSLE The airmail rates to two countries are shown. Emily sent a letter weighing 96g to Malaysia and a letter weighing 39g to Sweden by airmail. How much did she pay altogether?
Mass |
Malaysia |
Sweden |
First 40g |
$0.55 |
$1.10 |
Every additional 20g |
$0.15 |
$0.35 |
Mass of the letter to Malaysia excluding the first 40 g
= 96 - 40
= 56 g
Sets of additional 20 g of the letter to Malaysia
= 56 ÷ 20
= 2 r 16
Sets of additional 20 g and part thereof the letter to Malaysia
= 2 + 1
= 3
Amount that Emily paid for the letter to Malaysia
= 0.55 + 3 x 0.15
= 0.55 + 0.45
= $1.00
Amount that Emily paid altogether
= 1.00 + 1.10
= $2.10
Answer(s): $2.10