Operations
- Add and subtract whole numbers to 10 000 and add/subtract decimals to tenths.
- Multiply two- and three-digit numbers by a one-digit number.
- Divide using facts, with and without remainders, and interpret what a remainder means.
- Recall multiplication and division facts to 10 × 10.
Estimating before you calculate ("about 300 × 4 ≈ 1200") gives you a way to catch big mistakes.