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primary 6 | Maths
| Ratio
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Date Posted: 8 months ago
Views: 180
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Hope this helps
Date Posted:
8 months ago
May i know why 7u - 4u is 57? Isnt stated -57?
Mmm ...
At 1st is 7u
After gave away 57
Left 4u
So ...
Gave away 3u
Therefore, 3u = 57
At 1st is 7u
After gave away 57
Left 4u
So ...
Gave away 3u
Therefore, 3u = 57
Logically thinking... If you work on F.
At 1st is 3u
After received 57
Have 6u
So increased by 6u-3u = 3u
3u = 57
1u= 19
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.
.
.
At 1st is 3u
After received 57
Have 6u
So increased by 6u-3u = 3u
3u = 57
1u= 19
.
.
.
.
Thank you! Understand now!
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In this problem, the transfer is within themselves. When this happens, total amount before and after transfer REMAINS THE SAME.
The total before is 10 units. The total after is 5 units. So we make 5 units x2=10 units.
Each of the unit in after ratio has to be multiplied by 2. Now, after ratio is 4 : 6.
At first, siti had 7 units, now 4. So she gave 3 units to fauziah. Likewise, at first fauziah had 3 units. After receiving from siti, she now has 6 units, which means she received 3 units.
3 units= 57
Hope this helps.
The total before is 10 units. The total after is 5 units. So we make 5 units x2=10 units.
Each of the unit in after ratio has to be multiplied by 2. Now, after ratio is 4 : 6.
At first, siti had 7 units, now 4. So she gave 3 units to fauziah. Likewise, at first fauziah had 3 units. After receiving from siti, she now has 6 units, which means she received 3 units.
3 units= 57
Hope this helps.
Date Posted:
8 months ago
Yes. Helped a lot!
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