What is the difference between 19 and 91.
What different numbers can you make with the digits 2,5,1? Which is the largest? Can you write them in words?
How can you partition (split) 52? E.g. 50+2, 40+12 etc Remember to be systematic and do it in order so you con't miss any out and can see the pattern more easily.
You should be able to count on and back in 2s,5s and 10s.Make sure you are accurate. Play this game to help practice counting on in 2s,5s and 10s. Set the scale on the top left.