PSLE The airmail rates to two countries are shown. Sarah sent a letter weighing 95g to Malaysia and a letter weighing 44g to Canada by airmail. How much did she pay altogether?
Mass |
Malaysia |
Canada |
First 50g |
$0.65 |
$1.20 |
Every additional 25g |
$0.35 |
$0.40 |
Mass of the letter to Malaysia excluding the first 50 g
= 95 - 50
= 45 g
Sets of additional 25 g of the letter to Malaysia
= 45 ÷ 25
= 1 r 20
Sets of additional 25 g and part thereof the letter to Malaysia
= 1 + 1
= 2
Amount that Sarah paid for the letter to Malaysia
= 0.65 + 2 x 0.35
= 0.65 + 0.70
= $1.35
Amount that Sarah paid altogether
= 1.35 + 1.20
= $2.55
Answer(s): $2.55