PSLE The airmail rates to two countries are shown. Fanny sent a letter weighing 82g to Malaysia and a letter weighing 25g to Egypt by airmail. How much did she pay altogether?
Mass |
Malaysia |
Egypt |
First 30g |
$0.55 |
$1.60 |
Every additional 15g |
$0.25 |
$0.50 |
Mass of the letter to Malaysia excluding the first 30 g
= 82 - 30
= 52 g
Sets of additional 15 g of the letter to Malaysia
= 52 ÷ 15
= 3 r 7
Sets of additional 15 g and part thereof the letter to Malaysia
= 3 + 1
= 4
Amount that Fanny paid for the letter to Malaysia
= 0.55 + 4 x 0.25
= 0.55 + 1.00
= $1.55
Amount that Fanny paid altogether
= 1.55 + 1.60
= $3.15
Answer(s): $3.15