Q&A - P3 Math

[mama_10]

small:

mama_10:

:thankyou:
Actually I solved the problem w diff method :-
Boys []+14 []+14 []+14 []+14 []+14 []+14
Girls []+14 [\t 70\t]\t\t\t\t\t\t\t\t
168 / 2 = 84\t\t\t\t\t\t\t\t
84 / 6 = 14\t\t\t\t\t\t\t\t
2 units + 14 + 14 = 70\t\t\t\t\t\t
1 unit = 21\t\t\t\t\t\t\t\t
Boys at first = 6 units x 21 = 126

[] - 1 unit

Hi mama_10,

Can you please elaborate on how you got to:

2 units + 14 + 14 = 70

Thanks.

try to upload but failed. can teach me how to upload?
After equal number of boys n girls joined the campfire, boys became twice as amny as girls.
So the first (1unit+14) of the boys n girls r the same, 2nd and 3rd (1unit+14) of boys = 70 of girls (84-14=70).
the 2 units +14+14 from Boys = (1unit+14)+(1unit+14) = 70 from Girls

:thankyou:

[small]

Hi mama_10,


Got it now, thanks.

Actually your earlier working that confused me. I think the working should be:

Boys []+14 []+14 []+14
Girls []+14 [ 70 ]

instead of

Boys []+14 []+14 []+14 []+14 []+14 []+14
Girls []+14 [ 70 ]

cheers..

For upload the picture, you will need save the picture to your computer first, follow by upload it using \"tinypic\" function in the forum which located above the submit button, once done \"tinypic\" will give you a link, just add the link to your post.

[concerned1970]

Gd morning! I’ve pbs with following ques from Nanhua paper for last yr.


1) Jill had $5 more than Tom at first. After Jill spent $2, she had thrice as much as Tom. How much did Jill have at first? (can someone pls show me the model diagram?) Is it possible to show the workings in whole number rather than in decimal point form?

2) Mrs Tan bought a sack of rice on Monday and cooked 11/2kg of the rice everyday. By Sunday, she was 1/2kg short of rice. On which day did she cook 3/5 of the rice in the sack? (They only provided the answer but not workings in steps.)

3) 3/8+3/8+3/8+3/8=__x3/8+3/8
1) 6 2) 2 3) 3 4) 4

[corneyAmber]

concerned1970:

Gd morning! I've pbs with following ques from Nanhua paper for last yr.


1) Jill had $5 more than Tom at first. After Jill spent $2, she had thrice as much as Tom. How much did Jill have at first? (can someone pls show me the model diagram?) Is it possible to show the workings in whole number rather than in decimal point form?

2) Mrs Tan bought a sack of rice on Monday and cooked 11/2kg of the rice everyday. By Sunday, she was 1/2kg short of rice. On which day did she cook 3/5 of the rice in the sack? (They only provided the answer but not workings in steps.)

3) 3/8+3/8+3/8+3/8=__x3/8+3/8
1) 6 2) 2 3) 3 4) 4

And for 3) is (3). The rest I draw later...too sleepy now.. :lol:

[corneyAmber]

http://i52.tinypic.com/xfracw.jpg\">

[corneyAmber]

http://i55.tinypic.com/muafet.jpg\">

[concerned1970]

Y is the ans 3 for ques 3? Can u explain to me in steps? Ty for the model drawings.

[corneyAmber]

concerned1970:

Y is the ans 3 for ques 3? Can u explain to me in steps? Ty!

3) 3/8+3/8+3/8+3/8=__x3/8+3/8
1) 6 2) 2 3) 3 4) 4

3/8 + 3/8 + 3/8 = 3 x (3/8)

So 3/8+3/8+3/8+3/8 = [3x(3/8)] + 3/8

or maybe easier to see if 3/8 = x

x + x + x + x = 3(x) + x

[concerned1970]

ksi:

concerned1970:

Y is the ans 3 for ques 3? Can u explain to me in steps? Ty!

3) 3/8+3/8+3/8+3/8=__x3/8+3/8
1) 6 2) 2 3) 3 4) 4

3/8 + 3/8 + 3/8 = 3 x (3/8)

So 3/8+3/8+3/8+3/8 = [3x(3/8)] + 3/8

or maybe easier to see if 3/8 = x

x + x + x + x = 3(x) + x

Tysm

[corneyAmber]

concerned1970, you are welcome.