PSLE The airmail rates to two countries are shown. Gem sent a letter weighing 104g to Malaysia and a letter weighing 47g to Canada by airmail. How much did she pay altogether?
Mass |
Malaysia |
Canada |
First 50g |
$0.65 |
$1.50 |
Every additional 25g |
$0.35 |
$0.55 |
Mass of the letter to Malaysia excluding the first 50 g
= 104 - 50
= 54 g
Sets of additional 25 g of the letter to Malaysia
= 54 ÷ 25
= 2 r 4
Sets of additional 25 g and part thereof the letter to Malaysia
= 2 + 1
= 3
Amount that Gem paid for the letter to Malaysia
= 0.65 + 3 x 0.35
= 0.65 + 1.05
= $1.70
Amount that Gem paid altogether
= 1.70 + 1.50
= $3.20
Answer(s): $3.20