N

nearest tenth

This phrase refers to the act of measuring or rounding to the nearest tenth of a unit. For example, a distance of 7.2 centimeters is measured to the nearest tenth of centimeter. To round 7.17 centimeters to the nearest tenth is 7.2 centimeters.

pages 454–455

negative number

A number less than zero; a number to the left of zero on a horizontal number line.

number line

A line where numbers are marked at intervals.

pages 116–121, 122–125, 142–143, 147–148, 227–232, 232–233, 238–239, 320–321, 482–486

number sentence

An equation or inequality with numbers. For example, 3 × 2 + 5 = 10 + 1 and 2 < 3 + 1.

pages 72–78, 79–82, 85–87, 123–127, 465

numerator

The number written above the line in a fraction. The numerator tells how many equal parts of the whole you have. For example, 3 is the numerator in the fraction . (See also denominator.)

pages 298, 317, 454

numerical variable

Variables with values that are numbers.
(See also variable and value.)

pages 8, 10, 38, 186