January 18

Superb Subtraction

Our class has been spending a lot of time delving into 4 strategies about how to add 2 and 3 digit numbers. In the next few weeks, we’ll be sharing with you student-guided tutorials about how to use these strategies.

Yesterday, we launched into subtraction strategies. We learned how to subtract using a number line by “thinking addition”. See below for an example.

Today, we explored the traditional method of subtraction where “borrowing” or “regrouping” may be involved. Check out this video we watched in class that introduced us to the concept.

On Monday, we will explore a 3rd strategy. There are pros and cons to any strategy.Some are faster than others, some are easier to understand. Everyone has a favourite.

What is your favourite subtraction strategy?

Do you know how to solve a question in more than one way?

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MrsS

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Posted January 18, 2019 by MrsS in category Math

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