PSLE The airmail rates to two countries are shown. Joelle sent a letter weighing 74g to Malaysia and a letter weighing 25g to India by airmail. How much did she pay altogether?
Mass |
Malaysia |
India |
First 30g |
$0.55 |
$1.70 |
Every additional 15g |
$0.15 |
$0.65 |
Mass of the letter to Malaysia excluding the first 30 g
= 74 - 30
= 44 g
Sets of additional 15 g of the letter to Malaysia
= 44 ÷ 15
= 2 r 14
Sets of additional 15 g and part thereof the letter to Malaysia
= 2 + 1
= 3
Amount that Joelle paid for the letter to Malaysia
= 0.55 + 3 x 0.15
= 0.55 + 0.45
= $1.00
Amount that Joelle paid altogether
= 1.00 + 1.70
= $2.70
Answer(s): $2.70