PSLE The airmail rates to two countries are shown. Jaslyn sent a letter weighing 89g to Vietnam and a letter weighing 23g to New Zealand by airmail. How much did she pay altogether?
Mass |
Vietnam |
New Zealand |
First 30g |
$0.95 |
$1.60 |
Every additional 15g |
$0.65 |
$0.70 |
Mass of the letter to Vietnam excluding the first 30 g
= 89 - 30
= 59 g
Sets of additional 15 g of the letter to Vietnam
= 59 ÷ 15
= 3 r 14
Sets of additional 15 g and part thereof the letter to Vietnam
= 3 + 1
= 4
Amount that Jaslyn paid for the letter to Vietnam
= 0.95 + 4 x 0.65
= 0.95 + 2.60
= $3.55
Amount that Jaslyn paid altogether
= 3.55 + 1.60
= $5.15
Answer(s): $5.15