Engage in Math
Solve the following subtraction expressions. Either use the open number line as a model for thinking OR show your thinking on the open number line.
253 – 238 =
253 – 37 =
253 – 149 =
Post your open number line representation. Don’t worry about getting it perfect – we are all learning how to effectively represent thinking using models. Comment on the strategies you used – were they the same or different for each expression and why?
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