Jacob's idea
To solve ¾ ÷ 2/5, Jacob writes:
¾ ÷ 2/5 is the same as 15/20 ÷ 8/20. So the answer to ¾ ÷ 2/5 is the same as 15 ÷ 8.
 Which part(s) of Jacob’s claims are correct, if any?
 Which part(s) of the claims are flawed, if any?
 Will this method always provide a correct answer?
 How does this approach relate to the standard invert and multiply algorithm?
(Source: Adapted from Connected Mathematics Program, Michigan State University, 2006)
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