Another game to practice our strategies

Please modify the game to help you work out and talk about strategies and patterns you see. 

We have modified the game by using 5 cards with no time limit. 

Please use your strategies 

- making numbers to 5 or 10

Eg. 7+ 3 =10 or 5 + 6 = 10+ 1 = 11

- finding groups of numbers 

Eg. 2+ 3 = 5 and 1+ 4 = 5 and 5

So 3 groups of 5 or 3x5 = 15

Have fun and please let me know strategies that you used.