Q&A - PSLE Math

[tianzhu]

need some guide.
Mary had some beads. 2/5 of her beads were black and 1/10 of her beads were blue.
the remaining beads were red.
Mary used all her red beads to decorate some purse. The number of red beads used for each purse was 1/8 of the total number of beads. How many purses were decorated/
thanks

Hi ozora

Good Morning.

Please check your source for the last sentence.

For this question, use a common multiple of 40u (5, 10 and 8).

2/5 of her beads were black ----- 16u

1/10 of her beads were blue ----- 4u

The remaining beads were red ----- 20u

The number of red beads used for each purse was 1/8 of the total number of beads. ----- 5u

I am taking the question as number of purses decorated with red beads.

Number of purses decorated with red beads ----- 20/5 ----- 4.

The slide is meant to be a guide, I'll leave it to your kid to fill out the details.

Besides MD, you may also use solve this question using fractions.

1 – 2/5 -1/10 ----- 1/2

1/2 /1/8 ----- 4 (number of purses decorated with red beads )

Hope this helps.

Best wishes

[doraemo]

Thank you, tianzhu !!!

[ozora]

need some guide.
Mary had some beads. 2/5 of her beads were black and 1/10 of her beads were blue.
the remaining beads were red.
Mary used all her red beads to decorate some purse. The number of red beads used for each purse was 1/8 of the total number of beads. How many purses were decorated/
thanks

Hi ozora

Good Morning.

Please check your source for the last sentence.

For this question, use a common multiple of 40u (5, 10 and 8).

2/5 of her beads were black ----- 16u

1/10 of her beads were blue ----- 4u

The remaining beads were red ----- 20u

The number of red beads used for each purse was 1/8 of the total number of beads. ----- 5u

I am taking the question as number of purses decorated with red beads.

Number of purses decorated with red beads ----- 20/5 ----- 4.

The slide is meant to be a guide, I'll leave it to your kid to fill out the details.

Besides MD, you may also use solve this question using fractions.

1 – 2/5 -1/10 ----- 1/2

1/2 /1/8 ----- 4 (number of purses decorated with red beads )

Hope this helps.

Best wishes

Thanks. Yes just yesterday the teacher added in the last few words ( decorated with red beads) . Really helps a lot. Thanks again

[forestcadee]

Hi, could someone help to solve the following question without using the guess & check method
or algebra simultaneous method.

Q) Mrs. Yip bought minced chicken. She packed the chicken equally into
packets of 1/5 kg each. If she packs it equally into packets of 1/8 kg each,
she will get 12 more packets of minced chicken. How many kg of minced chicken
did she buy?

Thanks.

[Ice watch]

Hi, could someone help to solve the following question without using the guess & check method
or algebra simultaneous method.

Q) Mrs. Yip bought minced chicken. She packed the chicken equally into
packets of 1/5 kg each. If she packs it equally into packets of 1/8 kg each,
she will get 12 more packets of minced chicken. How many kg of minced chicken
did she buy?

Thanks.

[forestcadee]

Thanks, Ice Watch. Well explained.

[kkits23]

Hi All, I am New here, this is excellent forum, I am following it since last couple of months.

My DD in PSLE this year and trying her best.

Today we got stuck at one maths problem, kindly help me to understand how to solve below problem without guess and check.

Q- A shop sells caramel mufffins at $4.50 each and walnut muffin at $3.90 each. SAm bought both types of muffins for $308.40. He bought 74 muffins all together. How many Caramel and walnut muffins he bought ?

Please help. Thanks in advance .

[nicnac]

Hi All, I am New here, this is excellent forum, I am following it since last couple of months.

My DD in PSLE this year and trying her best.

Today we got stuck at one maths problem, kindly help me to understand how to solve below problem without guess and check.

Q- A shop sells caramel mufffins at $4.50 each and walnut muffin at $3.90 each. SAm bought both types of muffins for $308.40. He bought 74 muffins all together. How many Caramel and walnut muffins he bought ?

Please help. Thanks in advance .

Use Assumption method.


Assuming she bought all walnut muffins,

Total costs --> $3.90 * 74 = $288.60

Actual amount she paid = $308.40

Difference in amount --> 308.40 - 288.60 = 19.80

Difference in price between walnut and caramel muffin = 4.50 - 3.90 = 0.60

19.80 / 0.60 --> 33 ( this is the number of caramel muffin bought)

Number of walnut muffin bought = 74 - 33 = 41

Walnut muffin --> 41
Caramel muffin --> 33

[mytelcom]

Hi !
Any one could help me with my DD Maths problem? I tried to solve it but cannot.


The mass of a bottle completely filled with oil is 5 kg. When it is 1/4 full, its mass is 1.4 kg. Find the mass of the empty bottle.


Thank you all in advance.

[nicnac]

Hi !
Any one could help me with my DD Maths problem? I tried to solve it but cannot.

The mass of a bottle completely filled with oil is 5 kg. When it is 1/4 full, its mass is 1.4 kg. Find the mass of the empty bottle.

Thank you all in advance.

3/4 of the oil --> 3.6kg(5 - 1.4)
Thus 4/4 of the oil will weigh 4.8kg
Hence, the empty bottle weighs 0.2kg (5-4.8)