Q&A - PSLE Math

[Michaelia0816]

Help me with this question,

1)Aminah put 19 candies in Bag A,24 candies in Bag B,15 candies in Bag C and 80 candies in Bag D.She then added an equal number of candies into each of the bags.As a result Bag,D contained the same number of candies as the total number of candies in bags A,B and C.How many candies were there in Bag D at the end?

I know the answer is 91. But the solution, one of the part I do not understand,

Candies A + candies B + candies C —> 19 + 24 + 15 = 58

Candies D —> 80

Difference [D - (A + B +C)] = [80 - 58] = 22

let ‘1u’ be the equal no. of candies were added to each bag.

(A + B + C)… : (D)
1u + 1u + 1u : 1u

Difference (3u - 1u) = 2u

2u —> 22
1u —> 11

In the end, candies in D —> 80 + 11 = 91

Provided by Simon Teh, onsponge.

How to get 3u and 1u?

[tianzhu]

Hi


Q1) 20 + 5 ------ 25

Q2) 4 number of circles

Best wishes

[tianzhu]

Michaelia0816:

How to get 3u and 1u?

Hi

She then added an equal number of candies into each of the bags.

If the number added is 1u, we’ll have 1u for every one of the bags.

A – 1u

B – 1u

C – 1u

D – 1u

As a result Bag,D contained the same number of candies as the total number of candies in bags A,B and C.

80 + 1u ------- (19+1u) + (24+1u) + (15+1u)

You may carry on from here.

Best wishes

[dicoyote]

Hi,


Need some help on this question, thanks

Ali and Faiz had 576 sticks of satay altogether. Ali had 58 more sticks than Faiz. When Faiz had sold 1/3 as many sticks of satay as Ali, he was left with twice as many sticks as Ali. How many sticks of satay did Faiz sell?

[Michaelia0816]

Tianzhu, pls help with this question, it is from the CBS paper.


1) http://t.co/Xw6EKArf

2) http://t.co/DhdNHZqU ( read the caption)

3) http://t.co/e3zH6LZq

[kwcllf]

Hi, please help with the following question.


5 fishermen in a village can catch 10 fishes in 10 minutes on average. How long will 50 fishermen in the village take to catch 50 fishes on average.

Thanks!

[tianzhu]

dicoyote:

Hi,


Need some help on this question, thanks

Ali and Faiz had 576 sticks of satay altogether. Ali had 58 more sticks than Faiz. When Faiz had sold 1/3 as many sticks of satay as Ali, he was left with twice as many sticks as Ali. How many sticks of satay did Faiz sell?

Hi

You may use MD or Units and Parts.

Ali

Sold -------- 3 units

Left -------- 1 part

Faiz

Sold -------- 1 unit

Left -------- 2 parts

518/2 ------- 259

259 + 58 ------- 317

3 units + 1 part ------- 317

1 unit + 2 parts ------ 259

6 units + 2 parts ------ 634

5 units ------- 634 – 259 ------ 375

1 unit ------- 375/5 ------- 75 (Number of stay sticks sold by Faiz)

Best wishes

[tianzhu]

Michaelia0816:

Tianzhu, pls help with this question, it is from the CBS paper.

3) http://t.co/e3zH6LZq

Hi girl

What is CBS paper?

Your image is not clear; it looks like this similar type of question.

Please take a look at it.

Please enlarge your images for Q1 and Q2.

Best wishes

http://farm6.staticflickr.com/5142/5614468685_555807d62e_z.jpg\">

[MathIzzzFun]

kwcllf:

Hi, please help with the following question.


5 fishermen in a village can catch 10 fishes in 10 minutes on average. How long will 50 fishermen in the village take to catch 50 fishes on average.

Thanks!

5 fishermen -- 10 fishes --- 10 min
5 fishermen -- 1 fish --- 1 min
50 fishermen -- 10 fishes --- 1 min
50 fishermen -- 50 fishes --- 5 min

cheers.

[kwcllf]

MathIzzzFun:

kwcllf:

Hi, please help with the following question.


5 fishermen in a village can catch 10 fishes in 10 minutes on average. How long will 50 fishermen in the village take to catch 50 fishes on average.

Thanks!

5 fishermen -- 10 fishes --- 10 min
5 fishermen -- 1 fish --- 1 min
50 fishermen -- 10 fishes --- 1 min
50 fishermen -- 50 fishes --- 5 min

cheers.

MathIzzzFun,

Thanks again.