Q&A - P4 Math

[MathIzzzFun]

AgonyMum:

Hi,can anyone show me the proper working for these Fractions questions.

TIA!

3) The total mass of Johnny and Alex was 180kg.After going through a weight-loss prog, Johnny lost 2/5 of this original mass while Alex lost 20 kg. They have the same mass now. What was Alex's mass before he joined the prog?

After weight loss,

Johnny ---> 3 units
Alex ---> 3 units

Before weight loss,
Johnny --> 5 units
Alex --> 3 units + 20

Total : 8 units + 20 = 180
1 unit --> 20

Alex's original weight --> 80 kg

For MD, replace the units with blocks.

cheers.

[AgonyMum]

Hi MathIzzzFun,

Good morning to you!
Thanks so much for your solution and prompt assistance
You are a gem

[Thein]

http://i50.tinypic.com/2sakvpj.jpg\">

[AgonyMum]

Hi Thein,

Thanks so much for providing the solution in MD and algebra
I have shown it to my child and he understood immediately.
My son has asked me to send :hugs: and :snuggles: to all the helpful souls in this forum.

[Thein]

Hi Agonymom

You are most welcome

[Michaelia0816]

In 5 795-395=10000-a,what is the value of a?

[Michaelia0816]

Jennifer has some cubes.her number of cubes is more than 20 but less than 40.if she puts them into packets of 6,there will be 1 cube left. If she puts them into Packets of 7, there are 3 cubes left. How many cubes does jennifer have?

[Thein]

[quote]Jennifer has some cubes.her number of cubes is more than 20 but less than 40.if she puts them into packets of 6,there will be 1 cube left. If she puts them into Packets of 7, there are 3 cubes left. How many cubes does jennifer have?
[/quote] Since number of cubes is more than 20 but less than 40


http://i50.tinypic.com/ilg4cx.jpg\">

Hence the number of cubes Jennifer has is 31

[Charnic]

Dear all, pls assist w the model drawing for the following . Thanks.

John has twice as many apples as Mary. After John gave 40 apples to Mary, Mary has thrice as many apples as John. How many apples did Mary has at first ?

[MathIzzzFun]

CNS:

Dear all, pls assist w the model drawing for the following . Thanks.

John has twice as many apples as Mary. After John gave 40 apples to Mary, Mary has thrice as many apples as John. How many apples did Mary has at first ?

Hi

http://i46.tinypic.com/29beo2o.png\">

cheers.