Length: units, conversions, and reading a ruler
Understand the inverse relationship between unit size and count, convert between centimetres and metres, and read a ruler that doesn't start at zero. Unlimited questions, five difficulty levels, and a full worked solution every time, included free with weekly lessons.
Try one
How many metres are the same length as 500 cm?
Answer: 5
See one solved, step by step
A crayon is laid along a ruler. It starts at the 4 cm mark and ends at the 22 cm mark. How long is the crayon?
📘 Worked solution
122 - 4 = 18The crayon doesn't start at 0, so subtract the starting mark from the ending mark to find its true length.
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