CHM 115 High School Review Packet Spring 2025: Section 1.4

zero

All non____ digits are significant

nonzero digits

Zeroes between what are significant?

The First Nonzero Digits

Leading zeros to the left of what are not significant?

Trailing and Decimal Point

________ zeroes that are also to the right of a _____ ____ in a number are significant

The Zeroes Are not necessarily significant

When a number ends in zeroes that are not to the right of a decimal point, then:

Scientific Notation

To avoid ambiguity, use what?

Complete Certainty

Some numbers are exact because they are known with ______ ____

increased by one

If the digit to be dropped is 5, and if any digit following it is not zero, the last
remaining digit is what?

odd and even

If the digit to be dropped is 5 and is followed only by zeroes, the last remaining digit is increased by one if it is ___, but left as it is if _____.

even

If the digit to be dropped is 5 followed only by zeroes, the result is always rounded
to the ____ digit.

one or two and only

Always carry ___ __ ___ additional significant figures through a multistep
calculation and round off the final answer ____.

fewest significant figures

For multiplication and division, “the answer contains the same number of significant
figures as the measurement with the ________ _______ _______.”

fewest decimal places

For addition and subtraction, “the answer has the same number of decimal places as there are in the measurement with the ______ ______ ______.”