PSLE The airmail rates to two countries are shown. Jen sent a letter weighing 102g to Malaysia and a letter weighing 40g to Sweden by airmail. How much did she pay altogether?
Mass |
Malaysia |
Sweden |
First 50g |
$0.75 |
$1.90 |
Every additional 25g |
$0.55 |
$0.65 |
Mass of the letter to Malaysia excluding the first 50 g
= 102 - 50
= 52 g
Sets of additional 25 g of the letter to Malaysia
= 52 ÷ 25
= 2 r 2
Sets of additional 25 g and part thereof the letter to Malaysia
= 2 + 1
= 3
Amount that Jen paid for the letter to Malaysia
= 0.75 + 3 x 0.55
= 0.75 + 1.65
= $2.40
Amount that Jen paid altogether
= 2.40 + 1.90
= $4.30
Answer(s): $4.30