PSLE The airmail rates to two countries are shown. Yen sent a letter weighing 83g to Phillippines and a letter weighing 41g to Canada by airmail. How much did she pay altogether?
Mass |
Phillippines |
Canada |
First 50g |
$0.55 |
$1.90 |
Every additional 25g |
$0.35 |
$0.75 |
Mass of the letter to Phillippines excluding the first 50 g
= 83 - 50
= 33 g
Sets of additional 25 g of the letter to Phillippines
= 33 ÷ 25
= 1 r 8
Sets of additional 25 g and part thereof the letter to Phillippines
= 1 + 1
= 2
Amount that Yen paid for the letter to Phillippines
= 0.55 + 2 x 0.35
= 0.55 + 0.70
= $1.25
Amount that Yen paid altogether
= 1.25 + 1.90
= $3.15
Answer(s): $3.15