Q&A - P3 Math

[Min Min]

Can somebody help?


The cost of 7 erasers and 3 rulers is $5.05
The cost of 2 erasers and 7 rulers is $3.95
Find cost of 2 erasers and 2 rulers.

[Suz855]

Min Min:

Can somebody help?


The cost of 7 erasers and 3 rulers is $5.05
The cost of 2 erasers and 7 rulers is $3.95
Find cost of 2 erasers and 2 rulers.

Should the qn be 3erasersn 7 rulers=3.95

Then u simply add to get 10erasers n 10rulers=9.00
So 1 eraser n 1 ruler=0.90

If based on qn post the kid must know how to multiply decimal number n division of double digit number, at this point of time, the skill requirement is too much for p3 kid to handle.... Cheers

[Min Min]

Oh really? Is 3 erasers and 7 rulers…


The answer given was $2, so there’s typo error in the test paper?

[Min Min]

Thanks, suz855 quekcc

[numeric]

hercules:

tracywham:

Hi, sorry to trouble all of you again and need your help to solve this question.


Dave has 11 times as much as Oscar. Calvin and Dave have $172. Calvin and Oscar have $92. How much does Calvin have?

Solving for fun (below is the way I train my own kids).

http://i46.tinypic.com/2nk1il2.png\">

Another representation:
http://i47.tinypic.com/mkxlpl.jpg\">

[wahwah]

Hi all,

Need help with the following number pattern.

14, 14, 28, ,_, 336, 1680

Many thanks in advance.

[BigDevil]

Confirm there are 2 blank spaces?

[numeric]

If it's only 1 blank, then use multiplication.

http://i48.tinypic.com/35334lv.jpg\">

[wahwah]

That’s my question too, I also feel it should be one blank but there are 2 blanks.

[angel]

I’ve a question and seek your kind advice.


2 ducks and 2 chickens cost $24.
A duck costs twice as much as a chicken.
How much does a duck cost?

Thank you very much.