Question

Which pair of measurements is not equivalent?
450 mm, 4.5 m
250 cm, 2.5 m
4 km, 4,000 m
1.2 cm, 12 mm

Answer 1

450 mm doesn't equal 4.5 m.

450 mm = 45 cm
45 cm = 0.45 m
0.45 doesn't equal 4.5

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