PSLE The airmail rates to two countries are shown. Abi sent a letter weighing 83g to Vietnam and a letter weighing 48g to Sweden by airmail. How much did she pay altogether?
Mass |
Vietnam |
Sweden |
First 50g |
$0.85 |
$1.90 |
Every additional 25g |
$0.65 |
$0.85 |
Mass of the letter to Vietnam excluding the first 50 g
= 83 - 50
= 33 g
Sets of additional 25 g of the letter to Vietnam
= 33 ÷ 25
= 1 r 8
Sets of additional 25 g and part thereof the letter to Vietnam
= 1 + 1
= 2
Amount that Abi paid for the letter to Vietnam
= 0.85 + 2 x 0.65
= 0.85 + 1.30
= $2.15
Amount that Abi paid altogether
= 2.15 + 1.90
= $4.05
Answer(s): $4.05