Sort them out (1)

Can you each work out the number on your card? What do you notice? How could you sort the cards?

Problem

Sort Them Out (1) printable sheet

Image
Cards that read: 6 + 14, 19 + 5, 20 - 3, 7 + 3, 7 + 15, 7 + 9, 18 - 3, 20 - 8, 13 + 8, 5 + 6, 12 + 6, 17 + 6.
 

It's best to do this with $3$ other friends.

Share all the cards out equally among the four of you.

Work out what the answer is to each question on your cards.

Do you notice anything?

What do you notice?

Try sorting or arranging the cards in some way.