PSLE The airmail rates to two countries are shown. Wendy sent a letter weighing 81g to Indonesia and a letter weighing 25g to France by airmail. How much did she pay altogether?
Mass |
Indonesia |
France |
First 30g |
$0.95 |
$1.70 |
Every additional 15g |
$0.65 |
$0.65 |
Mass of the letter to Indonesia excluding the first 30 g
= 81 - 30
= 51 g
Sets of additional 15 g of the letter to Indonesia
= 51 ÷ 15
= 3 r 6
Sets of additional 15 g and part thereof the letter to Indonesia
= 3 + 1
= 4
Amount that Wendy paid for the letter to Indonesia
= 0.95 + 4 x 0.65
= 0.95 + 2.60
= $3.55
Amount that Wendy paid altogether
= 3.55 + 1.70
= $5.25
Answer(s): $5.25