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3. Han's calculation of 972 = 9 is shown here.
a. Find 180 - 9.
1 80
9 9 7
- 9
7 2
72

b. Use your calculation of 180 . 9 to explain how you know Han
has made a mistake.
c. Identify and correct Han's mistake.

3 Hans Calculation Of 972 9 Is Shown Here A Find 180 9 1 80 9 9 7 9 7 2 72 B Use Your Calculation Of 180 9 To Explain How You Know Han Has Made A Mistake C Iden class=