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primary 5 | Maths | Whole Numbers
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Alvin
Alvin

primary 5 chevron_right Maths chevron_right Whole Numbers chevron_right Singapore

Hi, anyone can help with detail explanation on how to do this sum? Thanks

Date Posted: 1 week ago
Views: 13
snell
Snell
1 week ago
at first
r: 2u
p: 32-2u

exchange
r: 2u => p: 3u


32 - 2u + 3u = 41
1u = 9


at first, 14 pencils

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J
J
1 week ago
For every 2 rulers he gave Sally, he received 3 pencils.

3 - 2 = 1

This means that the total number of items he has increases by 1 for every 2 rulers he trade.


Overall increase in number of items
= 41 - 32
= 9

So his overall number of items increased by 9. That's 9 times of 1, which means there were 9 times of 2 rulers traded.

So number of rulers traded
= 2 x 9
= 18

Number of pencils at first
= 32 - 18
= 14
Alvin
Alvin
1 week ago
Thank you all for helping. I wish all of you be bless with good health and fortune. Thanks

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Ruth Sin
Ruth Sin's answer
36 answers (A Helpful Person)
1st
Can draw a table to help you understand!