PSLE The airmail rates to two countries are shown. Kathy sent a letter weighing 89g to Indonesia and a letter weighing 25g to France by airmail. How much did she pay altogether?
Mass |
Indonesia |
France |
First 30g |
$0.55 |
$1.90 |
Every additional 15g |
$0.25 |
$0.85 |
Mass of the letter to Indonesia excluding the first 30 g
= 89 - 30
= 59 g
Sets of additional 15 g of the letter to Indonesia
= 59 ÷ 15
= 3 r 14
Sets of additional 15 g and part thereof the letter to Indonesia
= 3 + 1
= 4
Amount that Kathy paid for the letter to Indonesia
= 0.55 + 4 x 0.25
= 0.55 + 1.00
= $1.55
Amount that Kathy paid altogether
= 1.55 + 1.90
= $3.45
Answer(s): $3.45