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Negative numbers on the number line without reference to zero
Number line 3 256
Description
Exercise Name: Negative numbers on the number line without reference to zero
Math Missions: 6th grade (U.S.) Math Mission, Arithmetic essentials Math Mission, Pre-algebra Math Mission
Types of Problems: 1

The Negative numbers on the number line without reference to zero exercise appears under the 6th grade (U.S.) Math Mission, Arithmetic essentials Math Mission and Pre-algebra Math Mission. This exercise continues working on the number line but involves non-trivial labeling of points.

Types of Problems

There is one type of problem in this exercise:

  1. Tell the value of the dot: This problem has a number line drawn with some of the tick marks labeled and a blue dot. The user is asked to find the value of the blue dot.
    Nl3-1

    Tell the value of the dot

Strategies

This exercise is medium to get accuracy badges because the scale is not always counting by ones so it may take some thought. The speed badges are easy as soon as comfort with the number line and it's labels is attained.

  1. It is not always necessary to figure out the value between the tick marks. It is possible to sometimes jump tick marks if the scale works out well.
  2. The answer will always be an integer.
  3. To figure out the distance between tick marks take the larger number, subtract the smaller number, and divide by either 1) the number of spaces between the labeled tick marks or 2) one more than the number of the tick marks between the labeled tick marks. Try to figure out why!

Real-life Applications

  1. Negative numbers are used to represent land below sea level.
  2. Negative numbers are used to describe values on a scale that goes below zero, such as the Celsius and Fahrenheit scales for temperature.

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