While measuring the length of a knitting needle, the reading of the scale at one end is 3.0 cm and at the other end is 33.1 cm. What is the length of the needle?

In this problem, you are measuring the length of a knitting needle by reading the scale at both ends. To find the length of the needle, you subtract the smaller reading from the larger reading.

Given:
Reading at one end = 3.0 cm
Reading at the other end = 33.1 cm

To calculate the length of the needle, use the formula:

Length of the needle = Reading at the other end – Reading at one end

Substitute the given values into the formula:

Length of the needle = 33.1 cm – 3.0 cm
Length of the needle = 30.1 cm

Therefore, the length of the knitting needle is 30.1 centimeters.