PSLE The airmail rates to two countries are shown. Fanny sent a letter weighing 96g to Malaysia and a letter weighing 30g to India by airmail. How much did she pay altogether?
Mass |
Malaysia |
India |
First 40g |
$0.85 |
$1.40 |
Every additional 20g |
$0.65 |
$0.60 |
Mass of the letter to Malaysia excluding the first 40 g
= 96 - 40
= 56 g
Sets of additional 20 g of the letter to Malaysia
= 56 ÷ 20
= 2 r 16
Sets of additional 20 g and part thereof the letter to Malaysia
= 2 + 1
= 3
Amount that Fanny paid for the letter to Malaysia
= 0.85 + 3 x 0.65
= 0.85 + 1.95
= $2.80
Amount that Fanny paid altogether
= 2.80 + 1.40
= $4.20
Answer(s): $4.20