Q&A - P5 Math

[happyheart]

Thank you, the method looks simplified enough:)

[keinic]

Hi


Appreciate if someone could help with the following question:

Mrs Tan bought 4 times as many toy guns as teddy bears. She spent $1750 altogether. A toy gun costs $10 less than a teddy bear. The total cost of toy guns was $490 more than the total cost of teddy bears.

a) How much did Mrs Tan spend on the teddy bears?
b) How much did one teddy bear cost?

TIA.

[tianzhu]

keinic:

Hi


Appreciate if someone could help with the following question:

Mrs Tan bought 4 times as many toy guns as teddy bears. She spent $1750 altogether. A toy gun costs $10 less than a teddy bear. The total cost of toy guns was $490 more than the total cost of teddy bears.

a) How much did Mrs Tan spend on the teddy bears?
b) How much did one teddy bear cost?

TIA.

Hi

One neat way is to use MD.

Amount spent on teddy bears ------ (1750-490)/2 ----- 630
Amount spent on toy guns ------- 630 + 490 ----- 1120

Toy guns ------ 4 units
Teddy bears ------- 1 unit

1 unit ------- 1120/4 ----- 280

630 - 280 ------- 350

The cost of 350 is due to teddy bear costing $10 more.

Number of teddy bears ------ 350/10 ------- 35

Cost of 1 teddy bear ----- 630/35 ----- 18

Best wishes

[keinic]

Hi Tianzhu


Tks so much for your detailed explanation. My DS has a clear understanding of the answer now. Not sure if you could help with another question which we’ve difficulty in solving:

There are 9 stacks of chairs in the hall. There are 12 chairs in each stack. Mohan places each chair equally spaced apart to form the perimeter of a rectangle. If the number of chairs placed along its length is thrice the number of chairs placed along its breadth, how many chairs are placed along one of the lengths of the rectangle?

TIA.

[tianzhu]

keinic:

Hi Tianzhu


Tks so much for your detailed explanation. My DS has a clear understanding of the answer now. Not sure if you could help with another question which we've difficulty in solving:

There are 9 stacks of chairs in the hall. There are 12 chairs in each stack. Mohan places each chair equally spaced apart to form the perimeter of a rectangle. If the number of chairs placed along its length is thrice the number of chairs placed along its breadth, how many chairs are placed along one of the lengths of the rectangle?

TIA.

Hi

Good Morning.

You're welcome.

This question has been discussed before.

Best wishes

http://farm6.staticflickr.com/5272/6897367566_8d8cd99d93_z.jpg\">

[keinic]

Good morning, Tianzhu. Wow, the well-illustrated solution makes it much easier to understand the question. Thanks so much!

[simple88]

Hi,

I need help on a ratio question. Please let me know what is the best method to tackle the question. I couldn’t comprehend the answer provided. If it has been asked before, plse kindly direct me. Thanks.

ACS 2011 SA1 Paper 2 Q17
Grandma had some yellow and purple sweets in the ratio of 9:7. On Monday, she makes 54 more yellow sweets. On Tuesday she gave away 44 purple sweets and sold 129 yellow sweets. The number of yellow sweets to the number of purple weets became 6:5. How many yellow sweets are there in the end?

[tianzhu]

simple88:

Hi,

I need help on a ratio question. Please let me know what is the best method to tackle the question. I couldn't comprehend the answer provided. If it has been asked before, plse kindly direct me. Thanks.

ACS 2011 SA1 Paper 2 Q17
Grandma had some yellow and purple sweets in the ratio of 9:7. On Monday, she makes 54 more yellow sweets. On Tuesday she gave away 44 purple sweets and sold 129 yellow sweets. The number of yellow sweets to the number of purple weets became 6:5. How many yellow sweets are there in the end?

Hi

This question has been discussed before.

Best wishes

http://farm8.staticflickr.com/7210/6837707220_51b42ebf08_z.jpg\">

[MathIzzzFun]

simple88:

Hi,

I need help on a ratio question. Please let me know what is the best method to tackle the question. I couldn't comprehend the answer provided. If it has been asked before, plse kindly direct me. Thanks.

ACS 2011 SA1 Paper 2 Q17
Grandma had some yellow and purple sweets in the ratio of 9:7. On Monday, she makes 54 more yellow sweets. On Tuesday she gave away 44 purple sweets and sold 129 yellow sweets. The number of yellow sweets to the number of purple weets became 6:5. How many yellow sweets are there in the end?

Hi

alternative approach using cross multiply ..

http://www.flickr.com/photos/62167097@N02/7069963797/in/photostream

cheers.

[Michaelia0816]

I think her nut cracking question!