1. Mathematical Task 4.1A

2. Use compatible numbers to perform mental calculations.
Objectives:
Apply commutative, associative, and distributive properties to perform mental calculations (Mental Math).
Use compatible numbers to perform mental calculations.
Use various techniques of compensation to do mental calculations.
Use Left-to-Right Method, Multiplying by Powers of 10 and Multiplying by Special Factors to do mental calculations.
Use different processes of Computational Estimation to approximate and answer to a computation.
Apply Range/Front-End Estimation/ to approximate answers to computations.
Apply Rounding Techniques (Round up/down/to 5/to nearest even/ to compatible numebrs to approximate answers to computations.
Mathematical Task 4.1A

4. Mathematical Task 4.1B

10. Mathematical Task 4.1C

19. Using a Calculator