Q&A - P5 Math

[Udon]

Good Morning,

Appreciate your help on the following questions.
Thanks for your time.


Q1. Ali and Tom had the same amount of money. After Ali spent $280 and Tom spent 1/5 of his money, the ratio of money they had left was 3:8 respectively.

(a) How much money did Ali have at first?
(b） Find the amount of money Tom had left.


Q2. At a bakery, there was an equal number of doughnuts and cup cakes. After 24 more doughnuts were baked and 8 cup cakes were sold, there were thrice as many doughnuts as cup cakes.

(a) What was the total number of doughnuts and cup cakes at the bakery at first?
(b) What was the total number of doughnuts and cup cakes at the bakery in the end?

[chloecube]

happyheart:

chloecube:

i hope its not to confusing for u,


6C + 5L + 1T = 380 ---Equation 1
2C + 1T = 188 ---Equation 2
1C + 1L = 44 ---Equation 3

Equation 1 - Equation 3
5C + 4L + 1T = 336---Equation 4

Equation 2 + Equation 3
3C + 1L + 1T = 232---Equation 5

Equation 4 - Equation 5
2C + 3L = 104

Equation 3 (x2)
2C + 2L = 88

from above, u can find out that 1L = 16
1C = 44-16=28
6C + 5L + 1T = 380
168 + 80 + 1T = 380
1T = 132

Yes, I can understand this one. The challenge I faced earlier was to first break down the various equations. Thank you.

ya, me too
but i've learnt alot from this forum, esp from Tianzhu and Mathizzfun

[tianzhu]

Udon:

Q2. At a bakery, there was an equal number of doughnuts and cup cakes. After 24 more doughnuts were baked and 8 cup cakes were sold, there were thrice as many doughnuts as cup cakes.

(a) What was the total number of doughnuts and cup cakes at the bakery at first?
(b) What was the total number of doughnuts and cup cakes at the bakery in the end?

Hi

Hope this helps.

Best wishes

http://farm8.staticflickr.com/7071/7367596916_321446c807_z.jpg\">

[the shadowed snake]

php:

the shadowed snake:

Hi how to do this


In a bus, there were 40% as many children as adults. After 22 adults alighted from the bus the percentage of the children increased to 60%. How many children were there in the bus?

Before : C --> 7u x 3 = 21u A --> 5u x 3 = 15u
After : C --> 3p x 7 = 21u A --> 2p x 7 = 14u

1u = 22
21u = 22x21 = 462

Hi php
The ans in the book is 12

Someone help me :?: :?: :?: :?: :?: :?: :?: :?: :?: :?: :?: :?: :?: :?: :?: :?: :?: :?:

[MathIzzzFun]

the shadowed snake:

php:

[quote=\"the shadowed snake\"]Hi how to do this


In a bus, there were 40% as many children as adults. After 22 adults alighted from the bus the percentage of the children increased to 60%. How many children were there in the bus?

Before : C --> 7u x 3 = 21u A --> 5u x 3 = 15u
After : C --> 3p x 7 = 21u A --> 2p x 7 = 14u

1u = 22
21u = 22x21 = 462

Hi php
The ans in the book is 12

Someone help me :?: :?: :?: :?: :?: :?: :?: :?: :?: :?: :?: :?: :?: :?: :?: :?: :?: :?:[/quote]Hi

the number of children remained the same before and after 22 adults alighted.

At first, children : adult --> 2 : 5
In the end, children : adult --> 3 : 2

number of children remained the same, so we have:
at first, children : adult --> 6u : 15u }
in the end, children : adult --> 6u : 4u } 11u adults alighted

11u --> 22, 1u --> 2
children --> 6 x 2 = 12

cheers.

[tianzhu]

Udon:

Q1. Ali and Tom had the same amount of money. After Ali spent $280 and Tom spent 1/5 of his money, the ratio of money they had left was 3:8 respectively.

(a) How much money did Ali have at first?
(b） Find the amount of money Tom had left.

Hi

Hope this helps.

Best wishes

http://farm9.staticflickr.com/8147/7182529523_ab2d13d36f_z.jpg\">

[the shadowed snake]

thanks MathIzzzFun :thankyou: :thankyou: :thankyou: :thankyou: :thankyou:

[beanbear]

Can someone pls help with this Qn?


A pet farm had the same number of kittens, puppies and rabbits at first. After 35 kittens, some puppies and rabbits were sold, there were 65 animals left. There were thrice as many rabbits as puppies left. There were 26 fewer kittens left than the rabbits left. How many rabbits and puppies were sold?

[tianzhu]

beanbear:

Can someone pls help with this Qn?


A pet farm had the same number of kittens, puppies and rabbits at first. After 35 kittens, some puppies and rabbits were sold, there were 65 animals left. There were thrice as many rabbits as puppies left. There were 26 fewer kittens left than the rabbits left. How many rabbits and puppies were sold?

Hi

You may use MD or work using units.

In the end, the number of animals left is:

Rabbits ----- 3 units
Puppies ----- 1 unit
Kittens ------ 3 units – 26

7 units ------ 65+26 ------91
1 unit ------ 13

Number of rabbits left ------ 3*13 ------ 39
Number of puppies left ------- 13

Number of kittens at first ------ 13+35 ------- 48

Number of rabbits sold ------ 48 – 39 ------ 9
Number of puppies sold ------- 48 – 13 ------ 35

The answer is (35+9) or 44

Best wishes

[small]

At the end, there were 65 animals left


Rabbits ----- 3 units
Puppies ------ 1 unit
Kittens ------ 3 units - 26

7 units - 26 = 65
7 units = 91
1 unit = 13

At first, number of kittens is
3 units - 26 + 35 =48

So total number of rabbits and puppies at first is 96

96 - ( 4 x 13 )= 44

P/s: using phone to reply, not able to type much.