A Smartboard split into two parts to introduce the concept of column subtraction (no decomposition in part 1) to young children. Included is a set of problems set at 3 levels and includes answers.
The second part of the presentation introduces decomposition through the aid of a written story about Robin Hood. Robin helps Poor Unit out of a tricky tax situation by asking Poor Unit’s neighbour, Rich Ten, to lend him some cash. Rich Ten refuses to co operate and so Robin Hood whips out his bow and…
The Presentation finished with eight simple subtraction problems with answers to show how each problem should be recorded.
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