Prime Factor decomposition, HCF and LCM powerpoint. Multiplication dice game. Mult/div by 10, 100, 1000- Who Wants To Be A Millionaire? Image via Wikipedia Here is a superb plenary for a lesson about multiplying and dividing by 10, 100 and 1000.
This resource consists of two files. The first is a PowerPoint presentation that runs a game of Who Wants To Be A Millionaire. The Second is an Excel Document that gives pupils a worksheet to record their successes and failures on. Highest Common Factor Domino Puzzle. Image via Wikipedia With pupils on the lower end of the attainment spectrum I like to teach calculation of the highest common factor of a pair of numbers by the method of writing out the factors of each number, highlighting the common ones and then choosing the highest.
I find this more successful than teaching them to use prime factorisation. Whilst this has the disadvatange of not being suitable for large numbers, I’ve yet to see a GCSE question that asks for HCF of two numbers that are too large to use the simpler method. To add a nice change from simple ’10 questions’ worksheets I decided to put together the domino puzzle below based on finding HCF for relatively small numbers for one of my year 10 groups.