Measure in Centimeters
Length = end mark − start mark
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When measuring with a ruler, the easiest thing to miss is that objects do not always start at 0. This pencil lies anywhere on the ruler — read where it begins and where it ends, then tap the keypad to choose its length. A correct answer marks the start and end with arrows, reinforcing the “end mark minus start mark” method.
The pencil doesn't always start at 0! Read where it begins and ends on the ruler, then tap the number keypad to choose its length. A correct answer marks the start and end with arrows to reinforce “end minus start”.