Week 3: Addition and subtraction

Skills and concepts for Addition and subtraction.

1. 1. Add two multi-digit numbers
2. 2. Add two multi-digit numbers: word problems
3. 3. Subtract two multi-digit numbers
4. 4. Subtract two multi-digit numbers: word problems
5. 5. Comparison word problems with addition and subtraction
6. 6. Find two numbers based on sum and difference