Video Notes: Rounding Rules and Measurement Repetition

Vocabulary flashcards covering rounding rules and measurement concepts evident in the video notes.

Rounding to a specified decimal place

Adjusting a number so it has fewer decimal places by examining the next digit and altering the last kept digit accordingly.

Five-or-more rule

If the digit being dropped is 5 or greater, increase the previous kept digit by one.

Less-than-five rule

If the digit being dropped is less than five, keep the previous kept digit unchanged (round down).

Digit to be dropped

The first digit after the final place to which you are rounding; it determines whether you round up or down.

Unit (least significant kept place)

The value of the last kept digit in the rounded number; increasing it by one changes the rounded value by one unit.

Place value and decimal places

The position-value of digits (ones, tenths, hundredths, etc.) that determines rounding behavior.

Measurement repetition

Repeating multiple measurements (e.g., five measurements) to improve accuracy and assess variability.

Balance (instrument)

An instrument used to measure mass; measurements are often taken multiple times for reliability.

Rounding example: 3.345 to 3.35

When rounding to two decimal places, the dropped digit is 5, so the hundredths place is increased by one, producing 3.35.