Q&A - P3 Math

[PiggyLalala]

24hr-mum:

bala is one unit, so bala is 12 right?


thanks!

Yes My mistake. Bala- 1 unit =12

[24hr-mum]

but how to draw the model?

[24hr-mum]

i still cant reconcile how u get 4 units, as in how to show the lost of 4 and transfer of some to bala ?? loss of 4 is equal to 1 unit??

[PiggyLalala]

Sorry i do not know how to draw the model. But do you agree with me they have 48 marbles initially.

[PiggyLalala]

If yes, then the model can be

Ali : XXX
bala: X
Total = 48.
therefore 4X = 48.
X =12

[24hr-mum]

then the amt ali gave to bala leh? its part of the 22 that Bala has after the transfer, but how is it reflected in ali’s model?

[Champion]

24hr-mum:

how to do this?


Ali has 3 times as many marbles as Bala. After Ali lost 4 marbles and gave some marbles to Bala,, the two boys now have the same number of marbles.
Bala has 22 marbles now. How many marbles does Bala have at first?

Henry park 2010 SA2 Q44

DD1 works without drawing the model but get the answer as Bala had 12 marbles at 1st. Acceptable?

[PiggyLalala]

Champion:

24hr-mum:

how to do this?


Ali has 3 times as many marbles as Bala. After Ali lost 4 marbles and gave some marbles to Bala,, the two boys now have the same number of marbles.
Bala has 22 marbles now. How many marbles does Bala have at first?

Henry park 2010 SA2 Q44

DD1 works without drawing the model but get the answer as Bala had 12 marbles at 1st. Acceptable?

Should be acceptable. I think this question is easier to be solved without model.

[ttyh]

Boxes P and Q contain 356 green apples and 376 red apples. There are 12 more red apples than green apples in box P. How many fewer green apples than red apples are there in box Q?

[smartmummy]

ttyh:

Boxes P and Q contain 356 green apples and 376 red apples. There are 12 more red apples than green apples in box P. How many fewer green apples than red apples are there in box Q?

Totally 20 more red apples than green apples.
In P,12 more red apples than green apples.
so In Q,(20-12)=8 red apples more than green apples.
In other words 8 green apples fewer than red apples in box Q.