PSLE The airmail rates to two countries are shown. Tammy sent a letter weighing 82g to Malaysia and a letter weighing 41g to Switzerland by airmail. How much did she pay altogether?
Mass |
Malaysia |
Switzerland |
First 50g |
$0.95 |
$1.60 |
Every additional 25g |
$0.65 |
$0.70 |
Mass of the letter to Malaysia excluding the first 50 g
= 82 - 50
= 32 g
Sets of additional 25 g of the letter to Malaysia
= 32 ÷ 25
= 1 r 7
Sets of additional 25 g and part thereof the letter to Malaysia
= 1 + 1
= 2
Amount that Tammy paid for the letter to Malaysia
= 0.95 + 2 x 0.65
= 0.95 + 1.30
= $2.25
Amount that Tammy paid altogether
= 2.25 + 1.60
= $3.85
Answer(s): $3.85