Q&A - P4 Math

[smartmummy]

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

At first
John [][][][]
Brad []
After John gave 28 away
John [][][][]
From the 1/2 of first box u have to highlight that equal to 28
Brad []


3u+1/2u=28 ... u=8
I am not sure how to teach P4 this solving with fraction
3u=24
24 more marbles John had than Bradon at first.
Do u need model?

[chloecube]

smartmummy:

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

At first
John [][][][]
Brad []
After John gave 28 away
John [][][][]
From the 1/2 of first box u have to highlight that equal to 28
Brad []


3u+1/2u=28 ... u=8
I am not sure how to teach P4 this solving with fraction
3u=24
24 more marbles John had than Bradon at first.
Do u need model?

Wow, that is fast! Thank you so much!
I dun need model, your explanation is very clear

[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.

[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)

[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?

[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]