Q&A - P4 Math

[Jamesbond]

BigDevil:

Guess the book is wrong. What book is that?

My friends tuition teacher had corrected her note book...with this working given.....So I trusted their answer shud b correct.....May be just a mistake what the teacher did...
If u say my ans 9m is correct then I shall :celebrate: Pl confirm it.....

[BigDevil]

I got 9m as well.

:celebrate:

[Jamesbond]

BigDevil:

I got 9m as well.

:celebrate:

:hi5:

[Laura02]

Jamesbond:

BigDevil:

[quote=\"Jamesbond\"]A rope is 15 m long. Tan cut 9 pieces of rope from it, each 2/3 m long. What is the length of the rope left in metres?


Pl explain.... :?:

Why are you having problem with this question :?

Isn't this just simply a multiplication to get total length of 9 pieces of rope, then subtracting that from original length to get the remaining length??

I worked and got the answer as 9m. But the answer in book says 5m..the working given as
15/3=5
5*2=10
15-10=5m....so now I am :roll:[/quote]I would give the ans as 9m too.

The working fr the answer key seems to suggest typo error in the question.

[Champion]

Hi! Needs help to understand the question and the solution provided in the answer sheet; :thankyou: in Advance.


The total age of Andy and Karen is 56 years.
In four years' time, Andy will be three times as old as Karen.
How old is Andy now?

Answer sheet solution
In 4 years time, the total age of the two people will increase by 8 years.
Karen: 1 unit
Andy: 3 units
4 units = 56+8=64
1 unit = 64/4= 16
3 units = 3 x 16 = 48
48-4 = 44

Andy is 44 years old now.

Can someone explain to me - the 1st part about in 4 years time, total of the 2 people will increase by 8 years :?

[Augmum]

Champion:

Hi! Needs help to understand the question and the solution provided in the answer sheet; :thankyou: in Advance.


The total age of Andy and Karen is 56 years.
In four years' time, Andy will be three times as old as Karen.
How old is Andy now?

Answer sheet solution
In 4 years time, the total age of the two people will increase by 8 years.
Karen: 1 unit
Andy: 3 units
4 units = 56+8=64
1 unit = 64/4= 16
3 units = 3 x 16 = 48
48-4 = 44

Andy is 44 years old now.

Can someone explain to me - the 1st part about in 4 years time, total of the 2 people will increase by 8 years :?

Hi, happens to see this question.....
Becos the question given is the total age of 2 persons, Andy n Karen.
for Andy, in 4 yrs time will be +4 and for Karen, in 4 yrs time will also be +4,
So total +8 yrs.....
Hope it helps.....

[Champion]

Augmum:

Champion:

Hi! Needs help to understand the question and the solution provided in the answer sheet; :thankyou: in Advance.


The total age of Andy and Karen is 56 years.
In four years' time, Andy will be three times as old as Karen.
How old is Andy now?

Answer sheet solution
In 4 years time, the total age of the two people will increase by 8 years.
Karen: 1 unit
Andy: 3 units
4 units = 56+8=64
1 unit = 64/4= 16
3 units = 3 x 16 = 48
48-4 = 44

Andy is 44 years old now.

Can someone explain to me - the 1st part about in 4 years time, total of the 2 people will increase by 8 years :?

Hi, happens to see this question.....
Becos the question given is the total age of 2 persons, Andy n Karen.
for Andy, in 4 yrs time will be +4 and for Karen, in 4 yrs time will also be +4,
So total +8 yrs.....
Hope it helps.....

Thank you, Augmum for the explanation; Appreciates very much :))

[vsk]

Jim bought 3 goldfish and 4 swordtails and paid $8.10. He then bought 5 goldfish and 2 swordtails and paid $9.30. How much did he pay for goldfish ?.


Kindly help to resolve this. Thanks.

[corneyAmber]

vsk:

Jim bought 3 goldfish and 4 swordtails and paid $8.10. He then bought 5 goldfish and 2 swordtails and paid $9.30. How much did he pay for goldfish ?.


Kindly help to resolve this. Thanks.

3G + 4S -> 8.10
[5G + 2S -> 9.30] x 2
10G + 4S ->18.60
(10-3)G -> 18.60-8.10
7G -> 10.50
G -> $1.50
8G -> 1.5 x 8 = $12

The gold fishes are $12.

[BigDevil]

ksi:

7G -> 10.50
G -> $1.50
8G -> 1.5 x 8 = $12

The gold fishes are $12.

I think you meant G -> $1.05
8G -> 1.05 x 8 = $8.40