PSLE The airmail rates to two countries are shown. Ivory sent a letter weighing 97g to Phillippines and a letter weighing 41g to Switzerland by airmail. How much did she pay altogether?
Mass |
Phillippines |
Switzerland |
First 50g |
$0.65 |
$1.10 |
Every additional 25g |
$0.45 |
$0.45 |
Mass of the letter to Phillippines excluding the first 50 g
= 97 - 50
= 47 g
Sets of additional 25 g of the letter to Phillippines
= 47 ÷ 25
= 1 r 22
Sets of additional 25 g and part thereof the letter to Phillippines
= 1 + 1
= 2
Amount that Ivory paid for the letter to Phillippines
= 0.65 + 2 x 0.45
= 0.65 + 0.90
= $1.55
Amount that Ivory paid altogether
= 1.55 + 1.10
= $2.65
Answer(s): $2.65