PSLE The airmail rates to two countries are shown. Jean sent a letter weighing 66g to Malaysia and a letter weighing 11g to Sweden by airmail. How much did she pay altogether?
Mass |
Malaysia |
Sweden |
First 20g |
$0.55 |
$1.60 |
Every additional 10g |
$0.15 |
$0.70 |
Mass of the letter to Malaysia excluding the first 20 g
= 66 - 20
= 46 g
Sets of additional 10 g of the letter to Malaysia
= 46 ÷ 10
= 4 r 6
Sets of additional 10 g and part thereof the letter to Malaysia
= 4 + 1
= 5
Amount that Jean paid for the letter to Malaysia
= 0.55 + 5 x 0.15
= 0.55 + 0.75
= $1.30
Amount that Jean paid altogether
= 1.30 + 1.60
= $2.90
Answer(s): $2.90