Q&A - P5 Math

[tianzhu]

Jamesbond:

At Tans fruit stall, 3/4 of the apples were red and the rest were green. He sold 1/2 of the total number of apples. 5/6 of the apples sold were red. 28 green apples were left. How many red apples did Tan sell?

Hi Jamesbond

Good Afternoon.

Hope this helps.

Best wishes

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[S-H]

pup_love_Claire:

Hi S-H,


the ratio and unit price are multiply together to create the total price for 1 SET of the mentioned items e.g 3 staples and 4 rulers. The ratio sort of give you the items to make a group or set. From there, we can calculate how many group/set are there in the given total amount.

Hope it helps.

Thank you pup_live_Claire, didn't see tianzhu first explanation, it is clearer to me than the 2nd one. I understand now. Thanks u and thanks tianzhu!

[titank]

The ratio of Sally's age to Peter's age is 9:5.

The ratio of Simon's age to Peter's age is 3:2.
Find the ratio of Sally's age to Simon's to Peter's

[speedmaths.012624com]

titank:

The ratio of Sally's age to Peter's age is 9:5.

The ratio of Simon's age to Peter's age is 3:2.
Find the ratio of Sally's age to Simon's to Peter's

Hi titank,

Please see table.

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Can you follow?

Cheers


speedmaths.com


.

[pup_love_Claire]

titank:

The ratio of Sally's age to Peter's age is 9:5.

The ratio of Simon's age to Peter's age is 3:2.
Find the ratio of Sally's age to Simon's to Peter's

Changing ratio method.

Since Peter appeared to compare with 2 different people, however, he is still the same. So we have to find a common multiple to convert his ratio to be the same. Normally, take the 2 numbers of Peter's ratio to cross times each other.

Sally:Peter
(x2) 9:5 (x2)
18:10

Simon:Peter
(x5) 3:2 (x5)
15:10

Sally:Simon:Peter
18:15:10

Hope it's easy to understand

[celestial]

C and M have some beads. After C gave 5/9 of her beads to M, the ratio of the number of beads C had to the number of beads M had was 2:3. Find the ratio of the number of beads C had at first to the number of beads M had at first.

[smartmummy]

celestial:

C and M have some beads. After C gave 5/9 of her beads to M, the ratio of the number of beads C had to the number of beads M had was 2:3. Find the ratio of the number of beads C had at first to the number of beads M had at first.

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[iCreative Math]

php:

Hi iCreative Math


You can create a PDF file from Excel....Open the PDF file, take a snapshot, open Paint and paste the snapshot there....then save the file in any graphic format....

Hi php, thanks. Much appreciated. Will try it out tomorrow.

[iCreative Math]

php:

Hi iCreative Math


You can create a PDF file from Excel....Open the PDF file, take a snapshot, open Paint and paste the snapshot there....then save the file in any graphic format....

Hi php, thanks. Much appreciated. Will try it out tomorrow.

[celestial]

1)A locksmith had a total of 272 gold and silver uncut keys in the ratio 12:5. After cutting twice as many gold as silver keys, the ratio of the number of gold keys to the number of silver keys became 5:2. How many gold keys did the locksmith cut?


2) After saving for a month, 2/3 of S’s savings was the same as 1/2 of M’s savings. S then spent $330 and M saved an additional $430. In the end,the ratio of S’s savings to M’s savings became 2:3. How much did they save altogether in the end? tks