PSLE The airmail rates to two countries are shown. Jean sent a letter weighing 90g to Indonesia and a letter weighing 44g to Switzerland by airmail. How much did she pay altogether?
Mass |
Indonesia |
Switzerland |
First 50g |
$0.95 |
$1.60 |
Every additional 25g |
$0.65 |
$0.70 |
Mass of the letter to Indonesia excluding the first 50 g
= 90 - 50
= 40 g
Sets of additional 25 g of the letter to Indonesia
= 40 ÷ 25
= 1 r 15
Sets of additional 25 g and part thereof the letter to Indonesia
= 1 + 1
= 2
Amount that Jean paid for the letter to Indonesia
= 0.95 + 2 x 0.65
= 0.95 + 1.30
= $2.25
Amount that Jean paid altogether
= 2.25 + 1.60
= $3.85
Answer(s): $3.85