Question
PSLE
The airmail rates to two countries are shown. Tina sent a letter weighing 79g to Phillippines and a letter weighing 10g to China by airmail. How much did she pay altogether?

Mass Phillippines China
First 20g $0.55 $1.70
Every additional 10g $0.15 $0.55
2 m

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PSLE
The airmail rates to two countries are shown. Tina sent a letter weighing 79g to Phillippines and a letter weighing 10g to China by airmail. How much did she pay altogether?

Mass Phillippines China
First 20g $0.55 $1.70
Every additional 10g $0.15 $0.55