PSLE The airmail rates to two countries are shown. Jean sent a letter weighing 103g to Indonesia and a letter weighing 45g to Canada by airmail. How much did she pay altogether?
Mass |
Indonesia |
Canada |
First 50g |
$0.55 |
$1.90 |
Every additional 25g |
$0.25 |
$0.65 |
Mass of the letter to Indonesia excluding the first 50 g
= 103 - 50
= 53 g
Sets of additional 25 g of the letter to Indonesia
= 53 ÷ 25
= 2 r 3
Sets of additional 25 g and part thereof the letter to Indonesia
= 2 + 1
= 3
Amount that Jean paid for the letter to Indonesia
= 0.55 + 3 x 0.25
= 0.55 + 0.75
= $1.30
Amount that Jean paid altogether
= 1.30 + 1.90
= $3.20
Answer(s): $3.20