PSLE The airmail rates to two countries are shown. Xuan sent a letter weighing 82g to Indonesia and a letter weighing 49g to India by airmail. How much did she pay altogether?
Mass |
Indonesia |
India |
First 50g |
$0.85 |
$1.10 |
Every additional 25g |
$0.45 |
$0.35 |
Mass of the letter to Indonesia excluding the first 50 g
= 82 - 50
= 32 g
Sets of additional 25 g of the letter to Indonesia
= 32 ÷ 25
= 1 r 7
Sets of additional 25 g and part thereof the letter to Indonesia
= 1 + 1
= 2
Amount that Xuan paid for the letter to Indonesia
= 0.85 + 2 x 0.45
= 0.85 + 0.90
= $1.75
Amount that Xuan paid altogether
= 1.75 + 1.10
= $2.85
Answer(s): $2.85