Q&A - P3 Math

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hi,

Pls help with the following with model drawing. Thanks.

In a farm, there are 150 more goats than ducks. There are 1800 animal legs altogether. How many goats and ducks are there in the farm?

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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?

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Jane had $168 and Peter had $212. Peter gave some of his money to Jane. The amount of money Jane had in the end was $10 more than four times of what Peter had in the end. How much money had Peter in the end?

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Mrs Tan bought 20 chicken and duck eggs. She cooked 5 chicken eggs and 4 duck eggs. She had some chicken eggs and 2 duck eggs left. How many more chicken eggs than duck eggs did she buy?

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A packet of cookies was shared equally among 9 children. If 4 more children joined in, each child would get 8 fewer cookies. How many cookies were there in the packet?

[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.

[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