Please help with explanation. Thank you.

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Primary 4 Maths Singapore

Please help with explanation. Thank you.

Date Posted: 4 years ago

Snell

4 years ago

at first
p: 1u
r: 7u

after
p: 1u+36
r: 7u-36

7u - 36 = 1u + 36
1u = 12

(a)
12 pencils at first

(b)
48 rulers in the end

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Date Posted: 4 years ago