can anyone advise how to do? thanks

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primary 6 Maths Singapore

can anyone advise how to do? thanks

Date Posted: 4 years ago

Snell

4 years ago

2 pupils: 100
remaining: 7u
left: 4u
at first: 4u x 3 = 12u

12u = 7u + 100
u = 20

at first 240 pens

...

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Date Posted: 4 years ago