Please help me with DSs maths homework (Y5)

[LynetteScavo]

Choose four numbers from the following;

1 2 3 4 5 6 7 8 9

put each digit in a 2x2 box.

This makes two 2-digit numbers reading across, and two 2-digit numbers reading down.

Add up all four of the numbers.

(for example choosing 1 2 4 & 7 12 + 47 + 14 + 27 = 100)

How many differnt ways of making 200 can you find?

(Please help, I'm feeling poorly, my head hurts just reading this homework and DH is comming home late.)

Does that help Lynette?

DH said the homework should not be for Yr5 and he is not surprised that DS could not do it (Yr7) who is also in the top set for maths at school. It took some working out by DH who as I said before, uses a lot of maths for his job.

Thankyou!

I now have to explain this to DS - and encourage him to work it out for himself.

This'll teach me for saying "I really think he could cope with more challenging work in maths" at parents evening last week.

7138

1972 and 1792

Hi, do you have the derivation of these formulae? Will be good to know.

Probably not since this thread is nearly 12 years old

its 4,2, 8 , 5
4 2
8 5

= 200

The child in question will be around 27 by now!

lol i didnt see the date it was posted but my 9 yo sister just asked me to help her with this exact q

@Legomania- he’s 26 and I’m pretty sure could do this quite easily now (I’m still struggling!)

I think you definitely could now! Hahha

Btw how come you replied to the 26 year old post so fast I think it's hilarious 😂

DS should do it and if he is unable to then the class teacher should see that so that they can ensure that the class understand.