Question

note to student: look at the scale below. you may think that the measured value for \a\ is 13.5 cm. the correct answer is 13.50 centimeters. the zero is necessary to show that it is possible to estimate a measurement on this ruler to the hundredths (0.00) place. to help you understand this look at item \c\. you wouldnt say that \c\ is 14.3 cm, you would say that it is 14.35 cm. you can accurately estimate the last digit (5) in the hundredths place. also, you can be sure that this last digit is an estimate because there is no way to be certain what it is exactly. the measurement could be 14.34, 14.35, or 14.36, there is no way to tell. even if you said 14.33 or 14.38 you would not be wrong. the red (hundredths place) digit is an estimate. the rule in writing measurements is to read to the digit you are absolutely sure of and then estimate one more decimal place. use this rule and try to write all of the measurements shown on the worksheet below. a. __ b. c. d. e. __

Explanation:

Step1: Understand measurement rule

Read to the digit you are sure of and estimate one more decimal - place.

Step2: Measure 'a'

The value on the ruler for 'a' is between 13.4 and 13.5. We estimate the hundredths - place. The measurement is 13.45 cm.

Step3: Measure 'b'

The value for 'b' is between 10.9 and 11.0. Estimating the hundredths - place, it is 10.95 cm.

Step4: Measure 'c'

The value for 'c' is between 14.3 and 14.4. Estimating the hundredths - place, it is 14.35 cm.

Step5: Measure 'd'

The value for 'd' is between 12.4 and 12.5. Estimating the hundredths - place, it is 12.45 cm.

Step6: Measure 'e'

The value for 'e' is between 12.7 and 12.8. Estimating the hundredths - place, it is 12.75 cm.

Answer:

a. 13.45 cm
b. 10.95 cm
c. 14.35 cm
d. 12.45 cm
e. 12.75 cm