- MA3-AR-01 selects and applies appropriate strategies to solve addition and subtraction problems
Prior Knowledge
- Additive Relations (Stage 2)
Apply efficient mental and written strategies to solve addition and subtraction problems
- Solve word problems, including multistep problems
- Apply known strategies such as levelling, addition for subtraction, using constant difference, and bridging (Reasons about relations)
- Use place value to add or subtract 3 or more numbers with different numbers of digits
- Determine when it would be more efficient to use a calculator to add numbers
- Identify efficient and inefficient multidigit subtraction strategies
Use estimation and place value understanding to determine the reasonableness of solutions
- Round numbers appropriately when obtaining estimates to numerical calculations
- Use place value understanding to check for errors in calculations
- Use estimation to check the reasonableness of solutions to addition and subtraction calculations