Q&A - PSLE Math

[Vanilla Cake]

abc_parent:

Q14) If Ahmad and Ben work together, they can complete a job in 12 days. If Ahmad and Ben worked together for 3 days, followed by Ben who worked alone for the next 5 days, they can finish 5/12 of the job. How many days will each of them need to complete the job if they were to work alone?

See http://www.kiasuparents.com/kiasu/forum/viewtopic.php?t=280&postdays=0&postorder=asc&start=1380, Dharma's solution dated 20 Jun 2010 08:42 and Uncle Tianzhu's solution dated 20 Jun 2010 09:25

abc_parent:

Q15) Tommy and Wilson jog on a hexagon track (6 equal sides) at 8am. Tommy starts at point C while Wilson starts at point F. Both jog in the direction as shown by the arrows. Tommy's speed is 1.5 times Wilson's.
(a) At which point will they meet?
(b) If they meet at 8.20am ,find Tommy's speed?

See http://www.kiasuparents.com/kiasu/forum/viewtopic.php?p=178599#178599 dated 06 May 2010 22:51 and CoffeeCat's solution dated 06 May 2010 23:00

[abc_parent]

Thanks to ksi , Dharma , Uncle Tianzhu, VanillaCake & CoffeeCat!!!

[hamsterss]

Hello everyone


I have a question to ask.

Do we need to write word statement when doing maths paper 2? If we didn't,will we lose marks because of this?

PS. I don't know where to post this,so i make a new topic.

Thanks you!

[buds]

Please share the level of the child P1 to P6 and

we can move the post accordingly, hamsterss..
Topics beginning with \"Need Help\" especially are
frankly too vague to be a subject header..

We have many discussions here which may be
relevant to you and the answers you're seeking
in here. Click the blue link to go right there. Hope
this helps. > http://www.kiasuparents.com/kiasu/forum/viewforum.php?f=27

[ruyu]

hamsterss:

Hello everyone


I have a question to ask.

Do we need to write word statement when doing maths paper 2? If we didn't,will we lose marks because of this?

PS. I don't know where to post this,so i make a new topic.

Thanks you!

no we will not but it is good to state you units. IF you cant do something like this:

10+12=22 ($)

yep something like this but for just adding up normal numbers and not volume,money etc you need not put the signs. But after you have come up with the answer underline it ------ something like this. If it has a and b
----
questions. Use this

(A) How much do both of them have together if Tom has $18. (Take Sim has $ 12)

18+12=30 (a,$)

remember the a comes first followed by the unit. This rule also follows for b. So it saves time. A long time ago they deducted marks for no writing final statement. But now the rule is gone YAY!

[hamsterss]

ruyu:

hamsterss:

Hello everyone


I have a question to ask.

Do we need to write word statement when doing maths paper 2? If we didn't,will we lose marks because of this?

PS. I don't know where to post this,so i make a new topic.

Thanks you!

no we will not but it is good to state you units. IF you cant do something like this:

10+12=22 ($)

yep something like this but for just adding up normal numbers and not volume,money etc you need not put the signs. But after you have come up with the answer underline it ------ something like this. If it has a and b
----
questions. Use this

(A) How much do both of them have together if Tom has $18. (Take Sim has $ 12)

18+12=30 (a,$)

remember the a comes first followed by the unit. This rule also follows for b. So it saves time. A long time ago they deducted marks for no writing final statement. But now the rule is gone YAY!

I don't really understand the last part you wrote. :oops: Can you write more clearly? Thanks.
Two more.

Can i write
1.20+1.80=$3
instead of
$1.20+$1.80=$3?

Will i be deducted marks for writing the first one?
-------------------------
1.20+1.80=3
Ans : $3
As long as i write the unit on the answer line,i will not be deducted marks right?

Thanks

[livewith_vanilla]

hamsterss:

ruyu:

[quote=\"hamsterss\"]Hello everyone


I have a question to ask.

Do we need to write word statement when doing maths paper 2? If we didn't,will we lose marks because of this?

PS. I don't know where to post this,so i make a new topic.

Thanks you!

no we will not but it is good to state you units. IF you cant do something like this:

10+12=22 ($)

yep something like this but for just adding up normal numbers and not volume,money etc you need not put the signs. But after you have come up with the answer underline it ------ something like this. If it has a and b
----
questions. Use this

(A) How much do both of them have together if Tom has $18. (Take Sim has $ 12)

18+12=30 (a,$)

remember the a comes first followed by the unit. This rule also follows for b. So it saves time. A long time ago they deducted marks for no writing final statement. But now the rule is gone YAY!

I don't really understand the last part you wrote. :oops: Can you write more clearly? Thanks.
Two more.

Can i write
1.20+1.80=$3
instead of
$1.20+$1.80=$3?

Will i be deducted marks for writing the first one?
-------------------------
1.20+1.80=3
Ans : $3
As long as i write the unit on the answer line,i will not be deducted marks right?

Thanks :D[/quote]You will be deducted marks for writing the first one. Because (1.20+1.80=$3) does not state where you get the $ unit from.
The second one is correct.You will not get marks deducted.

In my school, once you are in p6, you stop writing those sentences. We just put :

Ans: ___________

Done.:)

[yeodo]

Hi another question :


Robin, Linda and Ali shared some money exactly. Robin had 3/5 as much money as Linda. Ali had 1/2 of what Linda had. What was the ratio of Robin’s money to Ali’s money?

[James Ang]

a Number pattern question from FAN Maths's Iexcel


6, 24, 60, 120, 210, __?__

what follows after 210?


most P5 and P6 students can solve them. Try it.

[Dharma]

yeodo:

Hi another question :


Robin, Linda and Ali shared some money exactly. Robin had 3/5 as much money as Linda. Ali had 1/2 of what Linda had. What was the ratio of Robin's money to Ali's money?

Robin : 6u
Linda : 10u
Ali : 5u

Ratio of Robin's money : Ali's money = 6 : 5