N1/E2.4
Recall addition and subtraction facts to 10
(a) Understand that there are different strategies to help with mental addition and subtraction
(b) Understand that subtraction is the inverse of addition
(c) Know how to align numbers for column addition
(d) Know all pairs of numbers with a total of 10
(e) Know subtraction facts for pairs of numbers with totals to 10, e.g. 10 - 6 = 4
(f) Know how to add back to check, e.g. 10 - 6 = 4, 6 + 4 = 10