Q&A - P4 Math

[MathIzzzFun]

CNS:

But if we want to use cut and transfer method, possible ? When I told my gal about the way you mentioned, she asked me to draw the model on pre and post, that is where i am stuck ? I am also quite confused when to use what method ? Sigh.. :oops:

Hi

here's the model...

http://i44.tinypic.com/1z5kndj.jpg\">

as mentioned by tianzhu, MD is not the only approach to problem solving and in this case, using the MD to show the transfer is a little cumbersome. The better way is to see that the total amount of flour remained the same and after the transfer, there were 3 units of flour in total -> which is the solution provided by tianzhu.

cheers.

[corneyAmber]

firefly38:

ksi:

[quote=\"Champion\"]:?: need help with this question as well :thankyou:


There were twice as many boys as girls at the school hall.
After 15 girls had left, the number of boys was thrice the number of the remaining girls. How many students wee there at the school hall?

http://i41.tinypic.com/2d1sg8z.jpg\">

Hi ksi,
From the model provided, it seems to me that total number of girls was 45 (u=30.. u+15.. 30+15), and total number of boys was 90 (45x2), hence total number of students at the hall should be 135 (45+90)?
But 120 seems right too (u=30.. 30x4), from the second model that you drew for the boys (the top most bar).
Appreciate your clarification.. Thanks![/quote]

I also pondered for a while. I believe Champion could solve this problem but got stumped by the English. The whole question was written in past tense. So when it asked 'how many students were there at the school hall?\" I took it as the students after 15 left off as it was asked immediately after stating 15 students left the hall. If the question was \"how many students were there at the school hall AT FIRST?\" Then I would put 135 as the answer. So to me, this question creates this kind of lousy ambiguity, it is a bad question.

[Champion]

ksi:

I also pondered for a while. I believe Champion could solve this problem but got stumped by the English. The whole question was written in past tense.

:oops: :oops: No lei, I stared at the question for 10 minutes and suddenly the :snooze: :snooze: instinct came in lioa

ksi:

So when it asked 'how many students were there at the school hall?\" I took it as the students after 15 left off as it was asked immediately after stating 15 students left the hall. If the question was \"how many students were there at the school hall AT FIRST?\" Then I would put 135 as the answer. So to me, this question creates this kind of lousy ambiguity, it is a bad question.

:thankyou: :thankyou: ksi once again for your input; appreciates much :celebrate:

[corneyAmber]

Champion:

ksi:

I also pondered for a while. I believe Champion could solve this problem but got stumped by the English. The whole question was written in past tense.

:oops: :oops: No lei, I stared at the question for 10 minutes and suddenly the :snooze: :snooze: instinct came in lioa

ksi:

So when it asked 'how many students were there at the school hall?\" I took it as the students after 15 left off as it was asked immediately after stating 15 students left the hall. If the question was \"how many students were there at the school hall AT FIRST?\" Then I would put 135 as the answer. So to me, this question creates this kind of lousy ambiguity, it is a bad question.

:thankyou: :thankyou: ksi once again for your input; appreciates much :celebrate:

Humble Mummy....next time I call you hummy mummy dearly.....

[Champion]

ksi:

Humble Mummy....next time I call you hummy mummy dearly.....

WCW:

hummy champ sotong mummy dearly

:oops: :oops: I am still the same sotong champion mummy

[corneyAmber]

Hummy Champo Mummy, is this question from school worksheet or assessment book?

[Champion]

ksi:

Hummy Champo Mummy, is this question from school worksheet or assessment book?

ksi, the 2 questions from worksheets given by teacher yesterday..DD1 asked me to help, I stared at it blankly for 10 minutes ..so, in the end i posted the questions here to seek help :imdrowning: DD1 took back the paper and said,\" Never mind, Mummy, you are tired, go and rest. I will ask Miss A to tomorrow.\"

:sad: :sad: this sotong mummy so weak with Maths

[ttyh]

A bag of flour has a mass of 3 3/4 kg. The mass of a bag of salt is 1 2/3 kg less than the mass of the bag of flour. Find the mass of the bag of salt.

Pls help…Thanks

[tianzhu]

ttyh:

A bag of flour has a mass of 3 3/4 kg. The mass of a bag of salt is 1 2/3 kg less than the mass of the bag of flour. Find the mass of the bag of salt.

Pls help....Thanks

Hi

Perhaps you may want to read the chapter on addition/subtraction of mixed numbers.

3 3/4 - 1 2/3 ------2 1/12 (mass of a bag of salt)

Best wishes

[smartmummy]

Need help!

A bakery produced 3000 loaves of bread.
It delivered the bread to 75 shops.
65 shops received 2000 loaves of bread altogether.
The remaining shops received an equal number of loaves of bread.
How many loaves did each of the remaining shops receive?

I got 66 but got remainder as well.is it ok? Any key word need to look into?