ACMNA128: Add and subtract decimals, with and without digital technologies, and use estimation and rounding to check the reasonableness of answers
Learning intentions:
- Understand how to add and subtract decimals.
- Understand the importance of using appropriate strategies and technologies to solve problems efficiently and effectively.
- Understand how to use estimation and rounding to check the reasonableness of answers.
- Students can accurately add and subtract decimals.
- Students can use mental strategies, such as aligning the decimal points and carrying or borrowing, to add and subtract decimals.
- Students can use appropriate digital technologies, such as a calculator or a spreadsheet, to add and subtract decimals.
- Students can use estimation and rounding to check the reasonableness of their answers.
- Students can interpret the results of their calculations in the context of the problem and determine if the answer is reasonable.
- Students can explain their reasoning and solve problems involving the addition and subtraction of decimals in a logical and organised way.
