Q&A - P3 Math

[en107rn.01056yahoo.01056com.01056sg]

Hi Tang


I like your solution on qs 1. It’s short and simple and the diagram helps.
I would like to try teaching my kids using your method but I’m a bit lost as to how to explain on certain portion.

I understand the top part but stuck in the following:

2 u –> 89 - 65 = 24

I understand where the 2u come from but how to explain why

89-65 =

TIA

[tianzhu]

Hi, hope this helps.


http://farm3.static.flickr.com/2610/3709629694_ac1deda57e_o.jpg\">

[en107rn.01056yahoo.01056com.01056sg]

Awesome tianzhu. Thanks!

[shurley197323]

Hi. thks for all the answer. But all this method is not taught in my girl’s school yet. How about yours ? They donot know "xy" and "1 or 2 units"

Do yr child in P3 already know that in school ?

[en107rn.01056yahoo.01056com.01056sg]

[quote]Hi. thks for all the answer. But all this method is not taught in my girl's school yet. How about yours ? They donot know \"xy\" and \"1 or 2 units\"

Do yr child in P3 already know that in school ?[/quote]Taught in dd school. Should be as around P3 level. I'm not sure but some question take a while for me to think.

Not taught at ds school but he is in P2.

[Tang]

There is a new P4 Maths Blog for P4 pupils. You may want to make full use of it.


http://p4mathsquestions.blogspot.com/

[shurley197323]

Thks. It very useful. Pls let me knw when there is a site for P3 too.

[Suz855]

[Moderator's note: Topics merged.]


Hi,

Can the below PS posted on P4Maths be solved using model, pls help, thanks :?

Mrs Raju bought a sack of rice which weighed less than 50kg. If she packed the rice into bags of 5kg each, she would have 3kg of rice left. If she packed it into bags of 7kg each, she would have 4kg of rice left. How many kg of rice did Mrs Raju buy?[/img]

[James Ang]

Suz855:

Hi,


Can the below PS posted on P4Maths be solved using model, pls help, thanks :?

Mrs Raju bought a sack of rice which weighed less than 50kg. If she packed the rice into bags of 5kg each, she would have 3kg of rice left. If she packed it into bags of 7kg each, she would have 4kg of rice left. How many kg of rice did Mrs Raju buy?[/img]

this question use a listing can do

multiple of 5 add 3
8, 13, 18, 23, 28, 33. 38. 43, 48

multiple of 7 add 4
11, 18, 25, 32, 39, 46

answer is 18

[Suz855]

I knew how to get the answer, I'm looking for model approach to solve this question. Anyone, thanks :oops: