Final answer:
A conversion chart is indeed used to find decimal and millimeter equivalents of fractional inches. This allows for precise measurements when using a ruler that includes both customary and metric units, especially for small objects.
Step-by-step explanation:
A conversion chart can be used to find the decimal and millimeter equivalent of fractional inches. This statement is True. When measuring objects with a ruler, such as a crayon, knowing how to convert between units is essential for precision. For example, small objects like a paper clip are more accurately measured in millimeters than centimeters due to the finer scale. Rulers often display both customary and metric units, which allows for this kind of conversion.
To convert from inches to millimeters or decimals, you can use a chart or perform the conversion mathematically. For instance, if you wanted to compare 5 cm and 70 mm you would need to convert one of the measurements so that both are expressed in the same unit, either centimeters or millimeters. Converting 70 mm to centimeters, you simply divide by 10, resulting in 7 cm. Now you can easily see which measurement is greater.
By using measurement conventions and accurate scales, such as a ruler with millimeter divisions, you can achieve a more precise measurement. For example, if a box is measured with a ruler that has millimeter markings, the reported measurement will have a higher degree of precision and accuracy.