Q&A - P3 Math

[mrswongtuition]

tinasen:

Samy had 4 times money that of Mary at first. After Samy gave $45 to Mary, both of them had equal amount of money. How much did Mary have at first? Please help to solve this by model method. I tried to understand the answer key that was given to my son, but not very sure how 3u is equated to 45.

S [___][___][___][___]
M [___]

to make the units into whole numbers (so tt S can give to M):

S [__][__][__][__][__][__][__][__]
M [__][__] .................[-----45----]

S must give M 3u for them to have equal amount of money.

3u -> $45
1u -> $15
2u -> $30

[tinasen]

Thanks a lot! It really helps me so much at this 11th hour - doing revision for my son.

mrswongtuition:

tinasen:

Samy had 4 times money that of Mary at first. After Samy gave $45 to Mary, both of them had equal amount of money. How much did Mary have at first? Please help to solve this by model method. I tried to understand the answer key that was given to my son, but not very sure how 3u is equated to 45.

S [___][___][___][___]
M [___]

to make the units into whole numbers (so tt S can give to M):

S [__][__][__][__][__][__][__][__]
M [__][__] .................[-----45----]

S must give M 3u for them to have equal amount of money.

3u -> $45
1u -> $15
2u -> $30

[elkniwt]

Dear tianzhu,


:salute: Thumbs up for your nice illustration! Wonder how you do it! really cool!

[tianzhu]

elkniwt:

Dear tianzhu,


:salute: Thumbs up for your nice illustration! Wonder how you do it! really cool!

Hi elkniwt

I am glad you liked it.

I use Microsoft PowerPoint 2007 to do the solutions.

Best wishes

[Muffins]

Hi Tianzhu, where exactly do you get the images?? Most of the time they are exactly relating to the question

[tianzhu]

Muffins:

Hi Tianzhu, where exactly do you get the images?? Most of the time they are exactly relating to the question

Hi

You may get the cliparts from Microsoft Office online.

Best wishes

[bookwormkids]

RE: P3 - RGPS SA2 2009


Hi! I’ve problem solving these 2 questions Q20 & Q29 from the abovee school. Anyone able to help?

Sorry, I’m do not know how to extract the info out from the pdf file.

Thanks.

[2DMommy]

bookwormkids:

RE: P3 - RGPS SA2 2009


Hi! I've problem solving these 2 questions Q20 & Q29 from the abovee school. Anyone able to help?

Sorry, I'm do not know how to extract the info out from the pdf file.

Thanks.

Is this the question ? Q20


http://postimage.org/image/34cdqcxac/

[thir-teen]

bookwormkids:

RE: P3 - RGPS SA2 2009


Hi! I've problem solving these 2 questions Q20 & Q29 from the abovee school. Anyone able to help?

Sorry, I'm do not know how to extract the info out from the pdf file.

Thanks.

Hi,

Question 20: http://postimage.org/image/2o6lifnc4/

Question 29: http://postimage.org/image/2o6n5yztw/

[bookwormkids]

Thank you 2DMummy & thir-teen!


Very grateful for your input & help! :celebrate: