Q&A - P5 Math

[tianzhu]

concerned1970:

3) A packet of potato chips cost twice as much as a packet of nuts. John spent 3/5 of his money on 9 packets of potato chips. What was the most number of packets of nuts he could buy with the rest of his money?

Hi

3/5 or 3 units ------- 9 packets of potato chips
3/5 or 3 units ------- 18 packets of nuts

1 unit ------- 6 packets of nuts

2 units ------ 12 packets of nuts

Best wishes

[tianzhu]

concerned1970:

4) Two ropes, P and Q, were each cut into 3 equal pieces. Each piece cut from Rope Q was 2/5 longer than each piece cut from Rope P. if Rope P was 2m long, how long was Rope Q?

Hi

1 piece of rope P -------- 5 units
1 piece of rope Q -------- 7 units

15 units -------- 2 m

3 units -------- 2/5 m

21 units --------2/5*7 --------2.8m

Best wishes

[tianzhu]

concerned1970:

5) Roy had a piece of string 3.5m long. He used 2/5 of it to tie a present and 3/7 of the remaining to tie a bundle of sticks. What was the length of the string used to tie the bundle of sticks? Is the answer correct?---->1-2/5=3/5, 3/5x3/7=9/35, 9/35x3.5=0.9 (Final answer)

Hi

1 - 2/5 ----- 3/5

3/5 * 3.5 ------ 2.1

3/7 * 2.1 ------ 0.9

Best wishes

[concerned1970]

Tysm Tianzhu and Php for yr help!

[S6169]

tianzhu:

concerned1970:

4) Two ropes, P and Q, were each cut into 3 equal pieces. Each piece cut from Rope Q was 2/5 longer than each piece cut from Rope P. if Rope P was 2m long, how long was Rope Q?

Hi

2/5 ----- 0.4

0.4*3 ------ 1.2

2 + 1.2 ------ 3.2

Rope Q ------ 3.2m

Best wishes

Sorry, a bit confuse here,
\"Each piece cut from Rope Q was 2/5 longer than each piece cut from Rope P\", 2/5 is fraction or refer to 2/5 m?
If it refer to the fraction, then should be 2*(1+2/5)=2.8m

[tianzhu]

S6169:

Sorry, a bit confuse here,
\"Each piece cut from Rope Q was 2/5 longer than each piece cut from Rope P\", 2/5 is fraction or refer to 2/5 m?
If it refer to the fraction, then should be 2*(1+2/5)=2.8m

Hi

Thank you for pointing out the error.

It should be 2/5 (fraction) not 2.5m

2.8 m is the correct answer.

Best wishes

[dyandp]

Hi Parents, anyone has idea how to workout this question , pls help ...


Three sisters Lisa , Ming and Nora shared the cost of a present for their father. Lisa paid 1/4 of the total share of Ming and Nora.
Ming paid 1/9 of the total share of Lisa and Nora.
Nora paid $60 more than Ming. How much did the present cost ?


Any help very much appreciated.

[dyandp]

Hi Parents, anyone has idea how to workout this question , pls help ...


Jason and Kevin were given some money each. If Jason and Kevin spent $100 and $50 each day respectively. Jason would have $1300 when Kevin had spend all his money. if Jason and Kevin spent $50 and $100 each day respectively, Jason would have $3700 when Kevin had spent all his money.
how much money was given to Jason at the beginning ?

Any help very much appreciated. :please:

[MathIzzzFun]

dyandp:

Hi Parents, anyone has idea how to workout this question , pls help ...


Jason and Kevin were given some money each. If Jason and Kevin spent $100 and $50 each day respectively. Jason would have $1300 when Kevin had spend all his money. if Jason and Kevin spent $50 and $100 each day respectively, Jason would have $3700 when Kevin had spent all his money.
how much money was given to Jason at the beginning ?

Any help very much appreciated. :please:

Hi

this was discussed in earlier posts - http://tinyurl.com/mathizzzfun-spendratio-01

cheers.

[small]

dyandp:

Hi Parents, anyone has idea how to workout this question , pls help ...


Jason and Kevin were given some money each. If Jason and Kevin spent $100 and $50 each day respectively. Jason would have $1300 when Kevin had spend all his money. if Jason and Kevin spent $50 and $100 each day respectively, Jason would have $3700 when Kevin had spent all his money.
how much money was given to Jason at the beginning ?

Any help very much appreciated. :please:

Hi,

HTH..

Kevin spent all his money thus we can make Kevin's ratios the same in both cases.

Case 1, Jason left 1300
Jason : Kevin
2 : 1
4 : 2

Case 2, Jason left 3700
Jason : Kevin
1 : 2

3u ----- 3700 - 1300
3u = 2400
1u = 800

Jason was given 4u + 1300 (case 1)
4u + 1300 ----- 4 x $800 + $1300 = $4500