Q&A - P4 Math

[tianzhu]

Hi All,

Would appreciate if you can help with the below question:


Sally has $8 more than Sam. If their mother gives them $7 each, they will have $32 altogether. How much does Sally have at first?

Thanks!!!

Hi YellowRabbit

Good Evening.

Hope this helps.

Best wishes

[ozora]

Need some guide. Is this question to find lCM? or do I do the listing method to get age :33?

[numeric]

Need some guide. Is this question to find lCM? or do I do the listing method to get age :33?

The most straightforward and easiest way is to list them out.

Here's an alternative.

[ozora]

Need some guide. Is this question to find lCM? or do I do the listing method to get age :33?

The most straightforward and easiest way is to list them out.

Here's an alternative.

Thanks.

[BigDevil]

Need some guide. Is this question to find lCM? or do I do the listing method to get age :33?

You answered your own question.
33 is not the LCM of 3, 4, and 5.

[mum2b]

Age now: List multiples of 3
Age last year: List multiples of 4, then plus 1
Age 2 years later: List multiples of 5, then minus 2

common number: 33.
Is this correct?

[Joy of Learning 111]

Age now: List multiples of 3
Age last year: List multiples of 4, then plus 1
Age 2 years later: List multiples of 5, then minus 2

common number: 33.
Is this correct?

Looks good to me.

[YellowRabbit]

Hi All,

Would appreciate if you can help with the below question:

Alex, Gil and Meg shared 740 cards. Alex had 20 fewer cards than Gil and 120 fewer cards than Meg. How many cards did Alex have?

Thanks!!!

Happy Chinese Year and 恭喜发财!!!

[Joy of Learning 111]

Hi All,

Would appreciate if you can help with the below question:

Alex, Gil and Meg shared 740 cards. Alex had 20 fewer cards than Gil and 120 fewer cards than Meg. How many cards did Alex have?

The approach in this type of question, and it is an approach which is widely applicable to other types of questions, is to identify the person with the smallest amount first and then express others in terms of that person. You then manipulate the total so that you are left with equally-sized units.

[mumof8]

Hi guys! Can someone help me with these question? TIA!!!


Mother had 48 more beads than her son at first. After her son threw away 12 beads,
she had four times as many beads as her son. How many beads did mother had at first?