PSLE The airmail rates to two countries are shown. Sabrina sent a letter weighing 86g to Laos and a letter weighing 22g to France by airmail. How much did she pay altogether?
Mass |
Laos |
France |
First 30g |
$0.85 |
$1.10 |
Every additional 15g |
$0.45 |
$0.45 |
Mass of the letter to Laos excluding the first 30 g
= 86 - 30
= 56 g
Sets of additional 15 g of the letter to Laos
= 56 ÷ 15
= 3 r 11
Sets of additional 15 g and part thereof the letter to Laos
= 3 + 1
= 4
Amount that Sabrina paid for the letter to Laos
= 0.85 + 4 x 0.45
= 0.85 + 1.80
= $2.65
Amount that Sabrina paid altogether
= 2.65 + 1.10
= $3.75
Answer(s): $3.75