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Ordering Cards printable loop cards

Look at these cards.

7

×2

3

×6

12

÷3

14

−2

4

×2

20

+1

10

×2

5

×2

8

−5

15

÷3

21

÷3

18

−3

Can you sort them so that they follow round in a loop?
 
Here is a card from a different set.

10

×3

What number would follow it?
 
What about this one? What would follow it?

12

÷2

What calculation might be on the card before this one?