Help Little E make baskets by adding 1 more, 2 more, 5 more, 10 more, and taking away 1 less, 2 less, 5 less, 10 less. You can also help him make baskets by comparing to see if the numbers are greater than, less than or equal to.
Common Core - 1.NBT.5. Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.
Common Core - 1.NBT.3. Compare two two-digit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and