PSLE The airmail rates to two countries are shown. Joelle sent a letter weighing 92g to Thailand and a letter weighing 42g to Egypt by airmail. How much did she pay altogether?
Mass |
Thailand |
Egypt |
First 50g |
$0.65 |
$1.80 |
Every additional 25g |
$0.25 |
$0.70 |
Mass of the letter to Thailand excluding the first 50 g
= 92 - 50
= 42 g
Sets of additional 25 g of the letter to Thailand
= 42 ÷ 25
= 1 r 17
Sets of additional 25 g and part thereof the letter to Thailand
= 1 + 1
= 2
Amount that Joelle paid for the letter to Thailand
= 0.65 + 2 x 0.25
= 0.65 + 0.50
= $1.15
Amount that Joelle paid altogether
= 1.15 + 1.80
= $2.95
Answer(s): $2.95