PSLE The airmail rates to two countries are shown. Linda sent a letter weighing 88g to Indonesia and a letter weighing 37g to France by airmail. How much did she pay altogether?
Mass |
Indonesia |
France |
First 40g |
$0.75 |
$1.10 |
Every additional 20g |
$0.55 |
$0.35 |
Mass of the letter to Indonesia excluding the first 40 g
= 88 - 40
= 48 g
Sets of additional 20 g of the letter to Indonesia
= 48 ÷ 20
= 2 r 8
Sets of additional 20 g and part thereof the letter to Indonesia
= 2 + 1
= 3
Amount that Linda paid for the letter to Indonesia
= 0.75 + 3 x 0.55
= 0.75 + 1.65
= $2.40
Amount that Linda paid altogether
= 2.40 + 1.10
= $3.50
Answer(s): $3.50