Q&A - P3 Math

[smartmummy]

Hi peapot!

yah, as many as means both has equal amount. U can define u means unit.
Thrice means 3u and u.
when u draw the model u have to consider the size. eg: if u draw a 2cm lengthy rectangular for 10 marbles then u have to draw 3cm lengthy for 15 marbles.
cheers!

[smartmummy]

Lisa has thrice as much as reena.

U have to draw two rect.one for Lisa one for reena

Lisa's Longer and reena's shorter.
Mark reena's u
Lisa's 3 boxes as reena's

L [U][U][U]

R [U]

I use iPhone to answer, sorry I can't draw the actual picture.

[peapot]

Ok, 10s!!!

[cathycho]

Can someone help me with this question?


Mr salam haas 17 cats and birds in total. If he counted 44 legs in all, how many birds are there?

[tianzhu]

cathycho:

Can someone help me with this question?


Mr salam haas 17 cats and birds in total. If he counted 44 legs in all, how many birds are there?

Hi

The numbers are small.P3 kids may use Guess and Check.

You may also use “Make a Supposition”

Assume all were cats, we’ve 17*4 ------ 68

Cat ----- 4 legs
Bird ----- 2 legs

Difference in number of legs between a cat and a bird ------ 2

68 – 44 ----- 24
24/2 ------ 12

12 birds

(5 cats)

For more practice, please visit pg 25-27 of this link.

http://www.kiasuparents.com/kiasu/forum/viewtopic.php?f=67&t=25121&start=240

Best wishes

[fohope]

Hi,

Kindly help to solve :

Christine distributed 100 sweets among 5 bags.
Bag A and Bag B had 52 sweets altogether.
Bag B and Bag C had 43 sweets altogether.
Bag C and Bag D had 34 sweets altogether.
Bag D and Bag E had 30 sweets altogether.
How many sweets are there in Bag C?

Thank you in advance.

[MathIzzzFun]

fohope:

Hi,

Kindly help to solve :

Christine distributed 100 sweets among 5 bags.
Bag A and Bag B had 52 sweets altogether.
Bag B and Bag C had 43 sweets altogether.
Bag C and Bag D had 34 sweets altogether.
Bag D and Bag E had 30 sweets altogether.
How many sweets are there in Bag C?

Thank you in advance.

Hi

A + B + C + D + E = 100
A + B = 52
D + E = 30
C = 100 - 52 - 30 = 18

18 sweets in Bag C.

cheers.

[HAPPYH]

MathIzzzFun:

fohope:

Hi,

Kindly help to solve :

Christine distributed 100 sweets among 5 bags.
Bag A and Bag B had 52 sweets altogether.
Bag B and Bag C had 43 sweets altogether.
Bag C and Bag D had 34 sweets altogether.
Bag D and Bag E had 30 sweets altogether.
How many sweets are there in Bag C?

Thank you in advance.

Hi

A + B + C + D + E = 100
A + B = 52
D + E = 30
C = 100 - 52 - 30 = 18

18 sweets in Bag C.

cheers.

Great. Thank you so much.

[ginangly]

Hi all,


I need help with this qn.

Royston is 34 years younger than his father. 6 years ago, his father is 3 times as old as him. How old is Royston’s father now.

Thanks.

[tianzhu]

ginangly:

Hi all,


I need help with this qn.

Royston is 34 years younger than his father. 6 years ago, his father is 3 times as old as him. How old is Royston's father now.

Thanks.

Hi

The difference in age between two people will always remain the same.

You may use MD.

Consider 6 years ago.

Father ----- 3 units
Royston ----- 1 unit

Royston is 34 years younger than his father.

2 units ----- 34
1 unit ----- 17

6 years ago, his father was 51 years old.

Therefore now, he is (51+6) or 57 years old.

Best wishes