Q&A - P4 Math

[corneyAmber]

Champion:

Hi, needs help with the following:-


Jane baked 60 more cupcakes than Annie at first.
After Jane had given away 180 cupcakes to her neighbors, Annie had twice as many cupcakes as Jane in the end.
Find the number of cupcakes Jane baked at first.
(Please present your answer with a model drawing)

http://i41.tinypic.com/20qcpee.jpg\">

Green = Jane
Yellow = Annie

[corneyAmber]

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\">

[Champion]

:thankyou: :thankyou: ksi for the answers; appreciates much! :salute:

[iFirefly]

ksi:

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!

[smartmummy]

How many students were at hall is 135.

After15 girls left,How many students are in the school now is 120.
According the qn the answer is 135.

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]

[Charnic]

I have a question. It goes like this :


I have 5026g of flour in a bag. I bot another packet which contain 4157g. If i would transfer some flour from the bag to the packet, the mass of flour remaining in the bag becomes twice the mass left in the packet. How much flour is left in the packet in the end?

I solved the question by using 5026+4157, thereafter divide by 3 to get the end result of flour left. However, i have been teaching my gal to use the transfer method, ( like what onsponge is doing), but i am stuck in the model. Can someone pls help to draw a clear model for the above ? Greatly appreciated! TIA

[chloecube]

MathIzzzFun:

chloecube:

Need help on this:

John had 4 times as many marbles as Brandon. After John gave 28 marbles away, Brandon had twice as many marbles as John. How many more marbles did John have than Brandon.
Thks

hi

MD approach ...

http://www.flickr.com/photos/62167097@N02/6880430857/in/photostream/

cheers.

good morning! thks!

[tianzhu]

CNS:

I have a question. It goes like this :


I have 5026g of flour in a bag. I bot another packet which contain 4157g. If i would transfer some flour from the bag to the packet, the mass of flour remaining in the bag becomes twice the mass left in the packet. How much flour is left in the packet in the end?

I solved the question by using 5026+4157, thereafter divide by 3 to get the end result of flour left. However, i have been teaching my gal to use the transfer method, ( like what onsponge is doing), but i am stuck in the model. Can someone pls help to draw a clear model for the above ? Greatly appreciated! TIA

Hi

Please check with your source.

tranfer from the packet to the bag? or tranfer from the bag to the packet ?

Best wishes

[Charnic]

Sorry, is packet to the bag. Pls assist to draw the model. TIA.

[tianzhu]

CNS:

Sorry, is packet to the bag. Pls assist to draw the model. TIA.

Hi

A student should take note that that the total amount of flour remains the same before and after.

Bag ----- 2 units
Packet ----- 1 unit

3 units ------ 9183

1 unit ------ 3061 (This is the amount of flour left in the packet).

Best wishes