Mod 2 Task B

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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