Reflection: Diverse Entry Points Checking the Reasonableness of Subtraction - Section 3: Student Practice


By teaching students multiple ways of checking for reasonableness (rounding or using compatible numbers), I provided students with diverse entry points on this assignment. When students are provided with more than one strategy, it not only provides multiple pathways to learning, but it also allows students to make mathematical decisions on their own.

Here is an example of a student using Rounding and another student using Compatible Numbers to check for reasonableness. 

  Diverse Entry Points: Reflection
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Checking the Reasonableness of Subtraction

Unit 5: Adding & Subtracting Large Numbers
Lesson 4 of 16

Objective: SWBAT check for reasonableness when subtracting multi-digit numbers.

Big Idea: Students will use rounding and compatible numbers to check for correct answers.

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