Q&A - P3 Math

[chloecube]

Sun_2010, Opps, i didnt read the question properly, yes, answer is 6Big balls, thks!

[chloecube]

chloecube:

Sun_2010, Opps, i didnt read the question properly, yes, answer is 6Big balls, thks!

and yes, ur model is very clear, only my brain is a bit \"unclear\" :snooze:
thks!

[chloecube]

WCW:

chloecube:

Need a little help here on DS P3 math


1) Hendry has some apples. when he put them equally into boxes of 3, he will have 5 more boxes than if he puts them into boxes of 4. how many apples does he have?

Ans is 60.

http://i56.tinypic.com/2jifbo.jpg\">

chloecube:

2) how do you teach your kid fraction, example:
arrange in order from greatest to smallest?
7/8 1/12 5/6

normally i will find a common factor from the nenominator. but if the no CF , how?

http://i51.tinypic.com/i299p4.jpg\">

1st find a common factor for the denominator. then change to compare.
i dnt think there shouldnt be any Q w/o CF?

thks WCW,
what abt those that doesnt have CF, hmm. such as 1/3 2/11 7/19?

[chloecube]

WCW:

for P3 level i dnt think will give such big Q right?

if really, then will be 3x11x19 to get the CF

:nailbite: that is what i tot too when i saw it
didnt know how to teach him
i remember seeing something similiar in his textbook, i go back check again and let you know..

[MathIzzzFun]

chloecube:

WCW:

[quote=\"chloecube\"]Need a little help here on DS P3 math


1) Hendry has some apples. when he put them equally into boxes of 3, he will have 5 more boxes than if he puts them into boxes of 4. how many apples does he have?

Ans is 60.

http://i56.tinypic.com/2jifbo.jpg\">

chloecube:

2) how do you teach your kid fraction, example:
arrange in order from greatest to smallest?
7/8 1/12 5/6

normally i will find a common factor from the nenominator. but if the no CF , how?

http://i51.tinypic.com/i299p4.jpg\">

1st find a common factor for the denominator. then change to compare.
i dnt think there shouldnt be any Q w/o CF?

thks WCW,
what abt those that doesnt have CF, hmm. such as 1/3 2/11 7/19?[/quote]Hi

for comparison of fractions, we can either check the denominator or numerator ie make all numerator the same or all denominator the same.

So, if the denominator numbers are big, then use the numerator because the numerators numbers are usually smaller.

1/3, 2/11, 7/19... make numerator = 14

1/3 = 14/42
2/11 = 14/77
7/19= 14/38

.. and compare the denominator

cheers.

[oscarsem]

CNS:

ozora:

Need help . Besides guess n check method, any other alt method for the following question. I have less than 270 marbles. The marbles can be kept equally in either 6 or 7 containers without remainder. What is the max. No of marbles I have?

Ans is 210. Goes by 7 times table.

the answer is 252. no 210 if u goes by the guess and check

[ozora]

oscarsem:

CNS:

[quote=\"ozora\"]Need help . Besides guess n check method, any other alt method for the following question. I have less than 270 marbles. The marbles can be kept equally in either 6 or 7 containers without remainder. What is the max. No of marbles I have?

Ans is 210. Goes by 7 times table.

the answer is 252. no 210 if u goes by the guess and check[/quote]thanks oscar. the answer is 252.
any other alternative method?

[chloecube]

Thank MathIzzzFun

that is a very good solution

[chloecube]

need help:


Joyce & Anne had S$3000.00 altogether.
Joyce gave S$650.00 to Anne and Anne had 2 times as much as Joyce.
How much does Joyce have at first?

[MathIzzzFun]

chloecube:

need help:


Joyce & Anne had S$3000.00 altogether.
Joyce gave S$650.00 to Anne and Anne had 2 times as much as Joyce.
How much does Joyce have at first?

Hi

You may want to give it a shot, taking note that :
- total amount both had remained the same after the transfer
- in the end, Anne had twice as much as Joyce ie total 3 units

cheers.