PSLE The airmail rates to two countries are shown. Elyse sent a letter weighing 87g to Thailand and a letter weighing 42g to Australia by airmail. How much did she pay altogether?
Mass |
Thailand |
Australia |
First 50g |
$0.95 |
$1.20 |
Every additional 25g |
$0.65 |
$0.50 |
Mass of the letter to Thailand excluding the first 50 g
= 87 - 50
= 37 g
Sets of additional 25 g of the letter to Thailand
= 37 ÷ 25
= 1 r 12
Sets of additional 25 g and part thereof the letter to Thailand
= 1 + 1
= 2
Amount that Elyse paid for the letter to Thailand
= 0.95 + 2 x 0.65
= 0.95 + 1.30
= $2.25
Amount that Elyse paid altogether
= 2.25 + 1.20
= $3.45
Answer(s): $3.45