Question

Which pair of measurements is not equivalent?

340 mm, 0.34 m
720 cm, 7.2 m
9.6 cm, 96 mm
1256 m, 12.56 km

Answer 1

I’m pretty sure that 1256m and 340 mm are not equivalent I used the canceling out method

Answer 2

1256 m = 1.256 km because kilo is a prefix meaning 1,000, not 100. Therefore, when we convert, we need to move the decimal place over 3 times, not 2.