Question

9. Turtle A moved 7 feet in 8 hours. Turtle B moved 8 feet in 9 hours. Both turtles moved at constant speeds. a. Which turtle went faster? b. Solve this problem in two different ways, explaining in detail why you can solve the problem the way you do. In particular, if you use fractions in your explanation, be sure to explain how the fractions are relevant. c. A student might say that turtle B moved faster than turtle A because the numbers for turtle B are greater (in other words, 8 \textgreater 7 and 9\textgreater 8). Even if the conclusion is correct, is the student's reasoning valid? Explain why or why not.

          9. Turtle A moved 7 feet in 8 hours. Turtle B moved 8 feet in 9 hours. Both turtles moved at
constant speeds.
a. Which turtle went faster?
b. Solve this problem in two different ways, explaining in detail why you can solve
the problem the way you do. In particular, if you use fractions in your
explanation, be sure to explain how the fractions are relevant.
c. A student might say that turtle B moved faster than turtle A because the numbers
for turtle B are greater (in other words, 8 \textgreater 7 and 9\textgreater 8). Even if the conclusion is
correct, is the student's reasoning valid? Explain why or why not.

$9. Turtle A moved 7 feet in 8 hours. Turtle B moved 8 feet in 9 hours. Both turtles moved at constant speeds. a. Which turtle went faster? b. Solve this problem in two different ways, explaining in detail why you can solve the problem the way you do. In particular, if you use fractions in your explanation, be sure to explain how the fractions are relevant. c. A student might say that turtle B moved faster than turtle A because the numbers for turtle B are greater (in other words, 8 7 and 98). Even if the conclusion is correct, is the student's reasoning valid? Explain why or why not.$

Added by Manuela H.

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