PSLE The airmail rates to two countries are shown. Marion sent a letter weighing 95g to Vietnam and a letter weighing 43g to Canada by airmail. How much did she pay altogether?
Mass |
Vietnam |
Canada |
First 50g |
$0.65 |
$1.10 |
Every additional 25g |
$0.25 |
$0.35 |
Mass of the letter to Vietnam excluding the first 50 g
= 95 - 50
= 45 g
Sets of additional 25 g of the letter to Vietnam
= 45 ÷ 25
= 1 r 20
Sets of additional 25 g and part thereof the letter to Vietnam
= 1 + 1
= 2
Amount that Marion paid for the letter to Vietnam
= 0.65 + 2 x 0.25
= 0.65 + 0.50
= $1.15
Amount that Marion paid altogether
= 1.15 + 1.10
= $2.25
Answer(s): $2.25