Hypatia and Archimedes leave pupils with a multi-step addition and subtraction problem to solve in the classroom. This animated short film is from the BBC Teach series, Hypatia's Mathematical Maze.
12 - 5 = 7 Just like with addition, we can use a part-whole model to help partition larger numbers to make them easier to deal with in subtraction problems. First, partition 35 into 30 and 5.
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