PSLE The airmail rates to two countries are shown. Marion sent a letter weighing 88g to Laos and a letter weighing 46g to Egypt by airmail. How much did she pay altogether?
Mass |
Laos |
Egypt |
First 50g |
$0.55 |
$1.10 |
Every additional 25g |
$0.15 |
$0.25 |
Mass of the letter to Laos excluding the first 50 g
= 88 - 50
= 38 g
Sets of additional 25 g of the letter to Laos
= 38 ÷ 25
= 1 r 13
Sets of additional 25 g and part thereof the letter to Laos
= 1 + 1
= 2
Amount that Marion paid for the letter to Laos
= 0.55 + 2 x 0.15
= 0.55 + 0.30
= $0.85
Amount that Marion paid altogether
= 0.85 + 1.10
= $1.95
Answer(s): $1.95