PSLE The airmail rates to two countries are shown. Kimberly sent a letter weighing 82g to Vietnam and a letter weighing 43g to Egypt by airmail. How much did she pay altogether?
Mass |
Vietnam |
Egypt |
First 50g |
$0.95 |
$1.60 |
Every additional 25g |
$0.55 |
$0.50 |
Mass of the letter to Vietnam excluding the first 50 g
= 82 - 50
= 32 g
Sets of additional 25 g of the letter to Vietnam
= 32 ÷ 25
= 1 r 7
Sets of additional 25 g and part thereof the letter to Vietnam
= 1 + 1
= 2
Amount that Kimberly paid for the letter to Vietnam
= 0.95 + 2 x 0.55
= 0.95 + 1.10
= $2.05
Amount that Kimberly paid altogether
= 2.05 + 1.60
= $3.65
Answer(s): $3.65