PSLE The airmail rates to two countries are shown. Marion sent a letter weighing 65g to Malaysia and a letter weighing 14g to New Zealand by airmail. How much did she pay altogether?
Mass |
Malaysia |
New Zealand |
First 20g |
$0.55 |
$1.60 |
Every additional 10g |
$0.25 |
$0.50 |
Mass of the letter to Malaysia excluding the first 20 g
= 65 - 20
= 45 g
Sets of additional 10 g of the letter to Malaysia
= 45 ÷ 10
= 4 r 5
Sets of additional 10 g and part thereof the letter to Malaysia
= 4 + 1
= 5
Amount that Marion paid for the letter to Malaysia
= 0.55 + 5 x 0.25
= 0.55 + 1.25
= $1.80
Amount that Marion paid altogether
= 1.80 + 1.60
= $3.40
Answer(s): $3.40