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Recall that the number line created in Add Whole Numbers started at 0 and showed the counting numbers increasing to the right as shown in the number line below. A submarine 500 ft below sea level is at -500 ft.īoth positive and negative numbers can be represented on a number line. Its position would then be -500 feet as labeled in the image below.ĭepths below sea level are described by negative numbers. A submarine, for example, might descend to a depth of 500 feet. The diagram shows that nearby mountains have higher (positive) elevations whereas the Dead Sea has a lower (negative) elevation.ĭepths below the ocean surface are also described by negative numbers.

The surface of the Mediterranean Sea has an elevation of 0 ft. Refer to the image below for a depiction. The elevation of the Dead Sea, which borders Israel and Jordan, is about 1,302 feet below sea level, so the elevation of the Dead Sea can be represented as -1,302 feet. Elevations above sea level are positive and elevations below sea level are negative. If a person writes a check for more than he has in his account, his balance will be negative.Įlevations can also be represented by negative numbers. A bank overdraft is another example of a negative number. Temperatures are not the only negative numbers. Temperatures below zero are described by negative numbers. The figure of a thermometer below shows -20^\circ F, which is 20 degrees below 0. A minus sign is shown before a number to indicate that it is negative. For example, -1^\circ F (read as “negative one degree Fahrenheit”) is 1 degree below 0. Very cold temperatures are measured in degrees below zero and can be described by negative numbers. A negative number is a number that is less than 0.

Compare and order positive and negative numbers using a number lineĭo you live in a place that has very cold winters? Have you ever experienced a temperature below zero? If so, you are already familiar with negative numbers.Locate positive and negative numbers on a number line.