PSLE The airmail rates to two countries are shown. Jen sent a letter weighing 91g to Thailand and a letter weighing 48g to France by airmail. How much did she pay altogether?
Mass |
Thailand |
France |
First 50g |
$0.65 |
$1.80 |
Every additional 25g |
$0.45 |
$0.80 |
Mass of the letter to Thailand excluding the first 50 g
= 91 - 50
= 41 g
Sets of additional 25 g of the letter to Thailand
= 41 ÷ 25
= 1 r 16
Sets of additional 25 g and part thereof the letter to Thailand
= 1 + 1
= 2
Amount that Jen paid for the letter to Thailand
= 0.65 + 2 x 0.45
= 0.65 + 0.90
= $1.55
Amount that Jen paid altogether
= 1.55 + 1.80
= $3.35
Answer(s): $3.35