PSLE The airmail rates to two countries are shown. Jaslyn sent a letter weighing 89g to Malaysia and a letter weighing 27g to Australia by airmail. How much did she pay altogether?
Mass |
Malaysia |
Australia |
First 30g |
$0.75 |
$1.30 |
Every additional 15g |
$0.45 |
$0.35 |
Mass of the letter to Malaysia excluding the first 30 g
= 89 - 30
= 59 g
Sets of additional 15 g of the letter to Malaysia
= 59 ÷ 15
= 3 r 14
Sets of additional 15 g and part thereof the letter to Malaysia
= 3 + 1
= 4
Amount that Jaslyn paid for the letter to Malaysia
= 0.75 + 4 x 0.45
= 0.75 + 1.80
= $2.55
Amount that Jaslyn paid altogether
= 2.55 + 1.30
= $3.85
Answer(s): $3.85