Addition
- B.1 Add numbers up to millions
- B.2 Add numbers up to millions: word problems
- B.3 Addition: fill in the missing digits
- B.4 Properties of addition
- B.5 Add 3 or more numbers up to millions
- B.6 Addition patterns over increasing place values
- B.7 Choose numbers with a particular sum
- B.8 Estimate sums
- B.9 Estimate sums: word problems