Each student had their maths books and their pencils at the ready and I set the timer for 2 minutes. They had to write down as many ways as they could think of to make the number 20 using addition, subtraction, multiplication, division, fractions etc.
There was absolute silence while the students busily wrote down their ideas. When the time ran out they volunteered their answers, putting a tick against their working out if some one else had the same way.
Here are just a sample of ways Room 20 came up with. Ka pai everyone!
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