PSLE The airmail rates to two countries are shown. Gem sent a letter weighing 84g to Malaysia and a letter weighing 32g to Egypt by airmail. How much did she pay altogether?
Mass |
Malaysia |
Egypt |
First 40g |
$0.85 |
$1.10 |
Every additional 20g |
$0.45 |
$0.35 |
Mass of the letter to Malaysia excluding the first 40 g
= 84 - 40
= 44 g
Sets of additional 20 g of the letter to Malaysia
= 44 ÷ 20
= 2 r 4
Sets of additional 20 g and part thereof the letter to Malaysia
= 2 + 1
= 3
Amount that Gem paid for the letter to Malaysia
= 0.85 + 3 x 0.45
= 0.85 + 1.35
= $2.20
Amount that Gem paid altogether
= 2.20 + 1.10
= $3.30
Answer(s): $3.30