## Q&A - P5 Math

- speedmaths.com
- BrownBelt
**Posts:**559**Joined:**Mon Oct 12,**Total Likes:**3

### Re: Q&A - P5 Math

Hi belnanna,belnanna wrote:Please can someone also teach this? Keep getting answer 20.. which is the wrong answer..

Thanks in advance!

Let's try:

John spent 3 u

Jiachun and Veronica spent a total of 2 u

Total spending for all three children is 5 u

5 u → $34.50

1 u →

**???**

John → 3 u →

**???**

Can you solve from here?

Please let us know if you still need help.

Cheers

**speedmaths**

.

### Re: Q&A - P5 Math

Total amount spent = $270 + 30%belnanna wrote:Margaret spent 30% of her salary on transport and $270 on clothes. She saved the remaining amount of her salary. If she saved $300 more than the amount she spent, how much was her savings?

Can someone please confirm the answer for this? My answer is different from the given answer...

Thanks in advance..

Total amount saved = $270 + 30% + $300 = $570 + 30%

Total amt spent + total amt saved = 100%

270 + 30% + $570 + 30% = 100%

$840 + 60% = 100%

==> 40% = $840

30% = $630

==> Total amt saved = $570 + $630 =

**$1200**.

### Re: Q&A - P5 Math

I believe area of circle is not covered in P5?nansk wrote:The area of semi-circle = 77 sqcm.belnanna wrote:Can anyone please explain how to do this? Thanks a lot..

So area of the whole circle will be 154 sqcm.

So radius will be sqrt(154 X 7 / 22)

Radius = 7 cm

Diameter = 14 cm

The diameter is the height of the triangle.

Area of the triangle = 1/2 X 14 X 14 = 98 sqcm

Area of the whole figure = 98 + 77 = 175 sqcm

However, a P5 student should recognize that the triangle is an

isosceles triangle (90, 45, 45 degree), so the height is same

as the base at 14cm.

- speedmaths.com
- BrownBelt
**Posts:**559**Joined:**Mon Oct 12,**Total Likes:**3

### Re: Q&A - P5 Math

Hi,Sruthi wrote:Thanks a lot speedmaths for your detailed explanation ..

Happy to help.

**speedmaths**

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