Q&A - P5 Math

[MathIzzzFun]

snowball:

MathIzzzFun:

[quote=\"snowball\"]Dave could buy either 24 sweets or 18 chocolates with the amount of money he had.

He used all his money to buy 8 sweets and some chocolates.
How many chocolates did he buy ?

24 sweets --> 18 chocolates
8 sweets --> 6 chocolates
18 - 6 = 12
He bought 12 chocolates.

cheers.

Above a ratio type Qn? Don't quite understand the concept, can use model to solve?[/quote]Same amount of money could buy 24 sweets OR 18 chocolates.
Amount of money --> 72 units
1 sweet --> 72 units/24 = 3 units
1 chocolate --> 72 units/18 = 4 units

8 sweets --> 8 x 3 units = 24 units
Money left --> 72 units - 24 units = 48 units
Number of chocolates bought --> 48 units / 4 units = 12

cheers.

[Trevortan]

Alan gets $4 more pocket money than Jane every week. Both of them spend $17 on food each week and save the rest of their pocket money. When Alan saves $84, Jane saves only $60. How much pocket money does Alan get in 4 weeks?

Thanks.

[MathIzzzFun]

Trevortan:

Alan gets $4 more pocket money than Jane every week. Both of them spend $17 on food each week and save the rest of their pocket money. When Alan saves $84, Jane saves only $60. How much pocket money does Alan get in 4 weeks?

Thanks.

Amount Alan saved more than Jane per week --> $4
Total amount Alan saved more than Jane --> $84 - $60 = $24
Number of weeks --> $24/ $4 = 6

Alan's savings per week = $84/6 = $14
Alan's pocket money in 4 weeks = $(14+17) x 4 = $124

cheers.

[Trevortan]

MathIzzzFun:

Trevortan:

Alan gets $4 more pocket money than Jane every week. Both of them spend $17 on food each week and save the rest of their pocket money. When Alan saves $84, Jane saves only $60. How much pocket money does Alan get in 4 weeks?

Thanks.

Amount Alan saved more than Jane per week --> $4
Total amount Alan saved more than Jane --> $84 - $60 = $24
Number of weeks --> $24/ $4 = 6

Alan's savings per week = $84/6 = $14
Alan's pocket money in 4 weeks = $(14+17) x 4 = $124

cheers.

Thanks!

[chloecube]

there were 4 times as many red pens as blue pens in a box. 415 red pens and 46 blue pens were removed from the box. as a result, the number of blue pens became 3 times as many as red pens. how many blue pens were there in the beginning?

[chloecube]

as fruit seller started with 68 more oranges than apples, after selling half the oranges, there were 28 more apples than oranges. find the total number of oranges and apple he had at first.


is the answer 288?

[CL1]

I can solve this question using the guess and check method. But i couldnt find an alternative method the guess and check method. can anyone help me?




**
A group of 24 children sold some tickets. Each tickets was sold at $5. Each boy sold 5 tickets and each girl sold 3 tickets. The boys collected $40 more than the girls. How many boys are there in the group?

[MathIzzzFun]

chloecube:

as fruit seller started with 68 more oranges than apples, after selling half the oranges, there were 28 more apples than oranges. find the total number of oranges and apple he had at first.


is the answer 288?

at first, total number is 316 -> 192 oranges & 124 apples.

At first,
apples --> 2 units
oranges --> 2 units + 68

In the end,
apples --> 2 units
oranges --> 1 unit + 34

there were 28 more apples than oranges in the end,
1 unit + 34 + 28 = 2 units
1 unit --> 62

at first, apples --> 124, oranges --> 192

you can also work backwards:
In the end,
Oranges --> 1u
Apples --> 1u + 28

At first, there were 68 more oranges than apples:
Oranges --> 2u
Apples --> 1u+28
So, 1u --> 28+68= 96

Oranges--> 192,
Apples --> 124

cheers.

[chloecube]

MathIzzzFun:

chloecube:

as fruit seller started with 68 more oranges than apples, after selling half the oranges, there were 28 more apples than oranges. find the total number of oranges and apple he had at first.


is the answer 288?

at first, total number is 316 -> 192 oranges & 124 apples.

At first,
apples --> 2 units
oranges --> 2 units + 68

In the end,
apples --> 2 units
oranges --> 1 unit + 34

Thks: )

there were 28 more apples than oranges in the end,
1 unit + 34 + 28 = 2 units
1 unit --> 62

at first, apples --> 124, oranges --> 192

you can also work backwards:
In the end,
Oranges --> 1u
Apples --> 1u + 28

At first, there were 68 more oranges than apples:
Oranges --> 2u
Apples --> 1u+28
So, 1u --> 28+68= 96

Oranges--> 192,
Apples --> 124

cheers.

[chloecube]

Tks:)