Q&A - P3 Math

[tianzhu]

jolenekoh:

Hi


Needs help to draw model and explaination

Mr King picked 388 durains from his durian plantation.
He picked 4 times as many durains as Mr. Kong.
How many durians did Mr Kong pick?




Rachel and Steven had 1008 marbles altogether. After Rachel gave 49 marbles to Steven. Rachel had 6 times as many marbles as Steven. How many marbles did Steven have at first?


Thank you.

Hi

Good Morning.

For the question on Rachel and Steven, actually MD might not be necessary.

The number of marbles stays the same before and after.

Steven had 144 marbles in the end.

He received 49 marbles from Rachel.

Therefore, he had 144 – 49 or 95 marbles at first.

I’ve also drawn more MD than necessary to show the flow of events. Your child may merge the MD once he/she becomes more familiar.

There are two solutions in one slide.

If the image is not big enough, please let me know.

Hope this helps.

Best wishes

http://farm9.staticflickr.com/8248/8643268123_6ca9c49bbe_z.jpg\">

[vaun]

PapayaDad:

(5) = 5 x 5 = 25

(2) = 2 x 2 = 4
(5) x (2) = 25 x 4 = 100

or may be

(5) x (2) = (10) = 10 x 10 = 100

my guess

Your \"guess\" sounds very reasonable..and i think that shall be the answer. thank u.

[Thinktank]

Hi need help on the following:


Debbie had twice as many dolls as Eileen and thrice as many dolls as Fion.
Given that they had 77 dolls altogether, how many more dolls did Debbie have than Fion?

Thank you!

[PapayaDad]

D=6u

E=3u
F=2u
Total 11u=77
u=11

D-F=6u-2u=4u=44

[Thinktank]

Thank you PapayaDad!

Its clear now!

[tianzhu]

bbc:

Peter lost some stamps. His mother gave him 230 stamps. He has 89 more stamps now than before he lost the stamps. How many stamps had he lost?

Hi

For the question on goats and ducks, you may use Grouping concept.

There are two solutions in one slide.

If the image is not big enough, please let me know.

Hope this helps.

Best wishes

http://farm9.staticflickr.com/8524/8645096344_8b88ff589e_z.jpg\">

[jolenekoh]

Thank you! Tianzhu


The model is very clear :lovesite:

tianzhu:

jolenekoh:

Hi

Needs help to draw model and explaination

Mr King picked 388 durains from his durian plantation.
He picked 4 times as many durains as Mr. Kong.
How many durians did Mr Kong pick?




Rachel and Steven had 1008 marbles altogether. After Rachel gave 49 marbles to Steven. Rachel had 6 times as many marbles as Steven. How many marbles did Steven have at first?


Thank you.

Hi

Good Morning.

For the question on Rachel and Steven, actually MD might not be necessary.

The number of marbles stays the same before and after.

Steven had 144 marbles in the end.

He received 49 marbles from Rachel.

Therefore, he had 144 – 49 or 95 marbles at first.

I’ve also drawn more MD than necessary to show the flow of events. Your child may merge the MD once he/she becomes more familiar.

There are two solutions in one slide.

If the image is not big enough, please let me know.

Hope this helps.

Best wishes

http://farm9.staticflickr.com/8248/8643268123_6ca9c49bbe_z.jpg\">

[jolenekoh]

Hi all


Is my answer correct? Thank you


Ron and Sam had 948 stickers altogether. After Sam bought 52 stickers, Sam would have thrice as many stickers as Ron. How many stickers did Ron have at first?


4U = 948 + 52 = 1000
1U = 1000 / 4 = 250

Sam : 3 x 250 = 750
At first Sam had } 750 - 52 = 698

[tianzhu]

jolenekoh:

Hi all


Is my answer correct? Thank you


Ron and Sam had 948 stickers altogether. After Sam bought 52 stickers, Sam would have thrice as many stickers as Ron. How many stickers did Ron have at first?


4U = 948 + 52 = 1000
1U = 1000 / 4 = 250

Sam : 3 x 250 = 750
At first Sam had } 750 - 52 = 698

Hi

Yes, you're moving towards the right direction

Sam ------ 698

Ron ------ 250 at first (Ans)

Best wishes

[jolenekoh]

:thankyou: Tianzhu


Still learning...hahaha...like back to school again

tianzhu:

jolenekoh:

Hi all

Is my answer correct? Thank you


Ron and Sam had 948 stickers altogether. After Sam bought 52 stickers, Sam would have thrice as many stickers as Ron. How many stickers did Ron have at first?


4U = 948 + 52 = 1000
1U = 1000 / 4 = 250

Sam : 3 x 250 = 750
At first Sam had } 750 - 52 = 698

Hi

Yes, you're moving towards the right direction

Sam ------ 698

Ron ------ 250 at first (Ans)

Best wishes