PSLE The airmail rates to two countries are shown. Jen sent a letter weighing 92g to Phillippines and a letter weighing 41g to Switzerland by airmail. How much did she pay altogether?
Mass |
Phillippines |
Switzerland |
First 50g |
$0.85 |
$1.50 |
Every additional 25g |
$0.55 |
$0.55 |
Mass of the letter to Phillippines excluding the first 50 g
= 92 - 50
= 42 g
Sets of additional 25 g of the letter to Phillippines
= 42 ÷ 25
= 1 r 17
Sets of additional 25 g and part thereof the letter to Phillippines
= 1 + 1
= 2
Amount that Jen paid for the letter to Phillippines
= 0.85 + 2 x 0.55
= 0.85 + 1.10
= $1.95
Amount that Jen paid altogether
= 1.95 + 1.50
= $3.45
Answer(s): $3.45