PSLE The airmail rates to two countries are shown. Cathy sent a letter weighing 108g to Malaysia and a letter weighing 43g to France by airmail. How much did she pay altogether?
Mass |
Malaysia |
France |
First 50g |
$0.85 |
$1.60 |
Every additional 25g |
$0.55 |
$0.70 |
Mass of the letter to Malaysia excluding the first 50 g
= 108 - 50
= 58 g
Sets of additional 25 g of the letter to Malaysia
= 58 ÷ 25
= 2 r 8
Sets of additional 25 g and part thereof the letter to Malaysia
= 2 + 1
= 3
Amount that Cathy paid for the letter to Malaysia
= 0.85 + 3 x 0.55
= 0.85 + 1.65
= $2.50
Amount that Cathy paid altogether
= 2.50 + 1.60
= $4.10
Answer(s): $4.10