# Multiplication and Division

### Concepts

- Estimate and multiply whole number by a 2-digit number.
- Estimate and divide whole number by a 1 and 2-digit number.
- Understand multiples and factors
- Use factors and multiples for test of divisibility
- Estimate and multiply decimal number by 1 and 2-digit numbers
- Estimate and divide decimal number by 1 and 2-digit numbers

### Theory

- Always estimate by rounding numbers. Then check the final answer. If you’re off by a 10, or 100, you know you made a silly mistake somewhere.

### Common Misconceptions

- Multiplying by a two digit number -> check how the tens digit is handled.
- When dividing -> check how to continue if a remainder is present (by adding a decimal point).
- When dividing -> check how two digit numbers are handled.

### Practice Quizzes