PSLE The airmail rates to two countries are shown. Xylia sent a letter weighing 91g to Thailand and a letter weighing 46g to France by airmail. How much did she pay altogether?
Mass |
Thailand |
France |
First 50g |
$0.75 |
$1.30 |
Every additional 25g |
$0.45 |
$0.45 |
Mass of the letter to Thailand excluding the first 50 g
= 91 - 50
= 41 g
Sets of additional 25 g of the letter to Thailand
= 41 ÷ 25
= 1 r 16
Sets of additional 25 g and part thereof the letter to Thailand
= 1 + 1
= 2
Amount that Xylia paid for the letter to Thailand
= 0.75 + 2 x 0.45
= 0.75 + 0.90
= $1.65
Amount that Xylia paid altogether
= 1.65 + 1.30
= $2.95
Answer(s): $2.95