Estimating and Benchmarking

https://docs.google.com/presentation/d/1ViIeR4175lQDgLIJ2-Er–YQ_4CJHgDXrIdYg8UzKG0/edit?usp=sharing   The above slideshow, and all the links allow students to plot graphs using Excel or Google Sheets, and{...}

 Launch Ask a student to give you a 2-digit number, i.e., 47. Take the reverse (74) and find the positive{...}

At your party you have _________ kids attending. How many sausage rolls does each child get? Can you work out{...}