A directory of useful objects found on the web for teaching Maths.

Browsing by The Australian Curriculum

Multiply and divide decimals by powers of 10 (ACMNA130)
* understanding and using the fact that equivalent division calculations result if both numbers are multiplied or divided by the same amount (for example 34.87 ÷ 7 is equivalent to 3487 ÷ 700)
* using and explaining the use of multiplication and division by powers of 10 to multiply decimal numbers mentally (for example 1.4 × 0.6 can be calculated by multiplying 14 by 6 and dividing the result by 100)