PSLE The airmail rates to two countries are shown. Lucy sent a letter weighing 96g to Indonesia and a letter weighing 43g to China by airmail. How much did she pay altogether?
Mass |
Indonesia |
China |
First 50g |
$0.65 |
$1.90 |
Every additional 25g |
$0.35 |
$0.85 |
Mass of the letter to Indonesia excluding the first 50 g
= 96 - 50
= 46 g
Sets of additional 25 g of the letter to Indonesia
= 46 ÷ 25
= 1 r 21
Sets of additional 25 g and part thereof the letter to Indonesia
= 1 + 1
= 2
Amount that Lucy paid for the letter to Indonesia
= 0.65 + 2 x 0.35
= 0.65 + 0.70
= $1.35
Amount that Lucy paid altogether
= 1.35 + 1.90
= $3.25
Answer(s): $3.25