Order the calulations from those with the least value to the greatest. Lots of levels, including; addition pairs to 20, addition pairs to 100, addition and subtraction of multiples of 10, and multiplication of numbers up to 10.
For more comparing and ordering resources click here.
KS2 Primary Framework:
Year 3: Add or subtract mentally combinations of one-digit and two-digit numbers
Year 4: Add or subtract mentally pairs of two-digit whole numbers
Year 5: Use knowledge of place value and addition and subtraction of two-digit numbers