Ans is 24

Wj ask r there other method?

Yuhang can't think if other method.

Noted, thks

Kim Soon Chin - thks.

Jia Ying Sin, would you like to show some working and we can help you from there?

Can help???

I don't really know how to do

For the second problem, draw the model showing a bag and a clock. Then stack up the model for 6 bags and 4 clocks. Try drawing the model and we will help you from where you are not able to proceed.

ok tx!!!

Hope this help.

Tx

I hope this can help.

I used branch method.

Convert 4.8 and 2.5 to improper fraction

4.8 = 48/10 = (2x24)/(2x5) 2.5 = 25/10 = (5x5)/(2x5)

OR splitting 25 into 2.5 x 10, so 25 x 4.8 + 152 x 2.5 = 2.5 x 10 x 4.8 + 152 x 2.5 = 2.5 x 48 + 152 x 2.5 = (48 groups of 2.5) + (152 groups of 2.5) = 200 groups of 2.5 = 500 Shu Hao's method works fine too. See which one's great for your child.

25 x 4.8 + 152 x 2.5 = 25 x 4.8 + 25 x 15.2 = 25 x (4.8+15.2) = 25 x 20 = 500 This methodology always tested in primary school exam papers.

Thanks all. Now i understand.

Looking at the working in the photo, your child was planning to rewrite the sum as 25 x 4.8 + 15.2 x 25, which is a good strategy. The next step could be 25 x (4.8 + 15.2) = 25 x 20 = 500. If he/she doesn't understand this, use examples such as 2 x 3 + 8 x 3 = 10 x 3.

25x4.8 + 152x2.5 = 25x(4x1.2) + (38x4)x2.5 = (25x4)X1.2 + 38x(4x2.5) = 100x1.2 + 38x10 = 120 + 380 = 500

Ans is 9.

Hmmm but answer is 18. Why need to use common factors ?

Oh ya.. 18 is the ans. Bcos 18 groups of 2 to make up the boys and 18 groups of 6 to make up the girls.

I see... Thanks so much !

Thanks

When question ask for greatest it's always clue to use HCF if ask for least is LCM

Fainted..

What's HCF and LCM ? Highest common factor and lowest common multiple respectively ? Pls advise

Yes that's rite

I see.. Learn something new today. Tqvm. You all are really helpful ☺️

This is the primary Sch method.

Yes, this is P5 question.

Pauline what I mean is I m using primary Sch method for my solution.