Fluent addition and subtraction

“Can your child quickly recall facts like '9 + 7 = 16' and '16 − 7 = 9', and use those to help work out bigger sums like '90 + 70'?”

0 / 3 mastered

• ⬜Rapidly recall 7 + 8 = 15 and 15 − 8 = 7
• ⬜Use 6 + 4 = 10 to derive 60 + 40 = 100
• ⬜Derive 35 + 5 = 40 from knowledge that 5 + 5 = 10