PSLE The airmail rates to two countries are shown. Cathy sent a letter weighing 87g to Malaysia and a letter weighing 44g to France by airmail. How much did she pay altogether?
Mass |
Malaysia |
France |
First 50g |
$0.55 |
$1.80 |
Every additional 25g |
$0.25 |
$0.60 |
Mass of the letter to Malaysia excluding the first 50 g
= 87 - 50
= 37 g
Sets of additional 25 g of the letter to Malaysia
= 37 ÷ 25
= 1 r 12
Sets of additional 25 g and part thereof the letter to Malaysia
= 1 + 1
= 2
Amount that Cathy paid for the letter to Malaysia
= 0.55 + 2 x 0.25
= 0.55 + 0.50
= $1.05
Amount that Cathy paid altogether
= 1.05 + 1.80
= $2.85
Answer(s): $2.85