A directory of useful objects found on the web for teaching Maths.
Add and subtract decimals, with and without digital technologies, and use estimation and rounding to check the reasonableness of answers (ACMNA128) * extending whole-number strategies to explore and develop meaningful written strategies for addition and subtraction of decimal numbers to thousandths * exploring and practising efficient methods for solving problems requiring operations on decimals, to gain fluency with calculating with decimals and with recognising appropriate operations
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