Q&A - P5 Math

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Jerico
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Re: Q&A - P5 Math

Post by Jerico » Wed Aug 10, 2016 10:58 pm

:thankyou: BigDevil for your help. Greatly appreciated ! :smile:

BigDevil
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Re: Q&A - P5 Math

Post by BigDevil » Thu Aug 11, 2016 10:48 am

Welcome! :smile:

Special-one
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Re: Q&A - P5 Math

Post by Special-one » Thu Aug 11, 2016 9:01 pm

Need help on this question pls.

Safiq had 300 apples and oranges. He sold 1/2 of the apples and 2/3 of the oranges. Then, he had 136 apples and oranges left. What fraction of the fruits were apples at the beginning?

Ender
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Re: Q&A - P5 Math

Post by Ender » Thu Aug 11, 2016 9:34 pm

Base on the fraction of apple and oranges sold, we let the apple at the beginning be 2u, and oranges be 3p

2u + 3p = 300 --- (1)

After selling 1/2 apple and 2/3 oranges,
1u + 1p = 136

X3 to the above eqn
3u + 3p = 408 ----(3)

(3) - (1)
1u = 108

In the beginning, there are 2u of apples = 216
Fraction of apple = 216/300 = 18/25

chloecube
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Re: Q&A - P5 Math

Post by chloecube » Sat Aug 13, 2016 5:09 pm

Hi, need help fir these 2 sum

A shop sold goldfish at $1.30 each and angelfish at $0.80 each.
Sam bought some goldfish and Jon bought some angelfish from the shop.
Sam spent $5.10 more than Jon but had 8 fish fewer than Jon.
A) how many goldfish did sam buy?
B) how much did jon spend on the angelfish?


A baker baked some cakes.30% of the cakes were chocolate cakes and the rest were pandan cakes. After selling 88 pandan cakes and 5/6 of the chocolate cakes, he has 1/5 of the original number of cakes left.
A)what fraction of the pandan cakes were sold?
B) how many chocolate cakes did he sell?


Ender
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Re: Q&A - P5 Math

Post by Ender » Sat Aug 13, 2016 6:57 pm

chloecube wrote:Hi, need help fir these 2 sum

A shop sold goldfish at $1.30 each and angelfish at $0.80 each.
Sam bought some goldfish and Jon bought some angelfish from the shop.
Sam spent $5.10 more than Jon but had 8 fish fewer than Jon.
A) how many goldfish did sam buy?
B) how much did jon spend on the angelfish?
First we find the difference in spending if Jon had the same number of fishes as Sam.
8 angel fish = 8 x 0.8= $6.40

If we take away 8 fishes from Jon , they would have the same number of fishes, and
the cost difference between Sam and Jon is now = 5.10 + 6.40
= $11.50

One goldfish and one angelfish difference= $1.30 - 0.8
=$0.50

A)Number of sam's goldfish = 11.5/0.5 = 23##

B)Jon has 23 + 8 =31 fishes
He spent = 31 x 0.8 =$24.80##

chloecube
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Re: Q&A - P5 Math

Post by chloecube » Sat Aug 13, 2016 7:17 pm

Tks

Ender
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Re: Q&A - P5 Math

Post by Ender » Sat Aug 13, 2016 10:50 pm

chloecube wrote:Hi, need help fir these 2 sum

A baker baked some cakes.30% of the cakes were chocolate cakes and the rest were pandan cakes. After selling 88 pandan cakes and 5/6 of the chocolate cakes, he has 1/5 of the original number of cakes left.
A)what fraction of the pandan cakes were sold?
B) how many chocolate cakes did he sell?
Since it's a percentage, we let the total cakes in the beginning be 100u. That means 30u for chocolate and 70u for Pandan.

There's two way to refer to the left over.

1st way is 1/5 of the original number.
Leftover = 1/5 X100u = 20u

2nd way to reference to leftover is after he sold 88 pandan and 5/6 chocolate
Leftover = (70u - 88) + 1/6(30u)
= (70u - 88) + 5u
= 75u -88

The leftover are equal,
20u = 75u - 88
55u = 88
u = 1.6

Total cakes in the beginning = 100u = 160 cakes
A) Fraction of pandan cakes sold = 88/160 = 11/20 ##

B) He sold 5/6 of 30u of choc. which is 25u
Choc cakes sold = 25u = 40 ###

chloecube
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Re: Q&A - P5 Math

Post by chloecube » Sun Aug 14, 2016 1:19 pm

Thank you so much!!

Flweewa
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Re: Q&A - P5 Math

Post by Flweewa » Sun Aug 14, 2016 3:06 pm

Hi,

Help needed for this question, how to solve by P5 method.

Alan and Ben folded some paper cranes.If Alan gives 120 paper
cranes to Ben,both of them will have the same number of cranes.If Ben gives 18 paper cranes to Alan, Alan will have 7 times as many paper cranes as Ben.how many paper cranes does Alan have?

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