nrc

Wednesday, 19 October 2016

2S - Subtraction

Today we looked at another strategy for solving subtraction problems. It's called the Singapore Method. To do it you make the largest number using the rods, before placing the smaller number underneath. Here is 10 - 2:


He space left over is the answer.


An 8 piece fits exactly so the answer is 8.
Here are some of the calculations we did. Can you work out the initial question?






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