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primary 5 | Maths
| Whole Numbers
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Hi, anyone can help with detail explanation on how to do this sum? Thanks
Date Posted: 4 years ago
Views: 239
at first
r: 2u
p: 32-2u
exchange
r: 2u => p: 3u
32 - 2u + 3u = 41
1u = 9
at first, 14 pencils
.
.
.
r: 2u
p: 32-2u
exchange
r: 2u => p: 3u
32 - 2u + 3u = 41
1u = 9
at first, 14 pencils
.
.
.
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
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
Thank you all for helping. I wish all of you be bless with good health and fortune. Thanks
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Can draw a table to help you understand!
Date Posted:
4 years ago
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