Q&A - P3 Math

[launt]

If I understood the question correctly, this should be a straight forward sum:


step 1:convert the denominator to 12...
2/3m = 8/12m

step 2: add length used to length remaining...
8/12m + 7/12m = 15/12m = 1 3/12m

Therefore original length = 1 3/12m

SPI:

Need help for this question. Thanks.

Linda used 2/3m of string to tie a pile of books and had 7/12m of string left. What was the original lenght of string she had at first?


Sorry post wrong place. Should be at P3/P4 Maths section.

[2DMommy]

Please help me with this two questions :


1) Adam had 4 times as many Singapore stamps as China stamps. After he gave away 678 Singapore stamps to his friend in exchange for 393 China stamps. Adam now has the samenumber of Singapore stamps as China stamps. What is the total number of stamps Adam had at first?

2)John and Peter had an equal number of stickers. After Peter gave 27 stickers to John, John had 4 times as many stickers as Peter. How many stickers did Peter have at first?

Thank you.

[tianzhu]

2DMommy:

1) Adam had 4 times as many Singapore stamps as China stamps. After he gave away 678 Singapore stamps to his friend in exchange for 393 China stamps. Adam now has the samenumber of Singapore stamps as China stamps. What is the total number of stamps Adam had at first?

Hi

Hope this helps.

Best wishes.

http://farm5.static.flickr.com/4131/5070717028_3539de688b_b.jpg\">

[2DMommy]

tianzhu:

2DMommy:

1) Adam had 4 times as many Singapore stamps as China stamps. After he gave away 678 Singapore stamps to his friend in exchange for 393 China stamps. Adam now has the samenumber of Singapore stamps as China stamps. What is the total number of stamps Adam had at first?

Hi

Hope this helps.

Best wishes.

http://farm5.static.flickr.com/4131/5070717028_3539de688b_b.jpg\">

Thank you !

[tianzhu]

2DMommy:

2)John and Peter had an equal number of stickers. After Peter gave 27 stickers to John, John had 4 times as many stickers as Peter. How many stickers did Peter have at first?

Hi

Hope this helps.

Best wishes

http://farm5.static.flickr.com/4111/5070245337_c308cce5bf_z.jpg\">

[2DMommy]

Hi tianzhu, thank you for the clear explanation. Some of the questions I could work out but just do not know how to draw the models and explain to my son.

[tianzhu]

2DMommy:

Hi tianzhu, thank you for the clear explanation. Some of the questions I could work out but just do not know how to draw the models and explain to my son.

Hi 2DMommy

You are welcome.

The good news is your son is in P3 /P4, there is still plenty of time as PSLE is two to three years away.

With more practices,you can only get better.

MD is one of many heuristics taught in primary Maths. Expose the kid to various strategies and let him/her decides the method he/she is most comfortable with.

Best wishes

[yeonee]

Can someone help me with this question?


45 blue balls and 12 green balls were put into a basket containing some blue and green balls. There were 23 more blue balls than green balls in the end. How many fewer blue balls than green balls were there in the basket at first?

[yeonee]

Hi, another question:-


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?

[peggy]

Hi TianZhu,


You’re really very helpful ! I appreciated very much. Though I may not be the one posting questions but had benefited by reading your reply. At least I can apply them for my son when we come across similar questions.

Thanks !!