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A number line is a horizontal line that has equally spread number increments. The numbers included on the line will determine how the number on the line can be answered.

A number line is a pictorial representation of numbers on a straight line. It's a reference for comparing and ordering numbers.

  • A number line is usually represented horizontally and can be extended infinitely in any direction.
  • The first mention of the number line as a tool for adding and subtracting is found in the Treatise on Algebra by John Wallis. In his work, Wallis describes addition and subtraction on it in terms of moving forward and backward, in the context of a person walking.
  • A blank number line is a visual diagram with no numbers or markers and is essentially used as a tool for solving word problems.

Steps to add/subtract on a number line:

  • Locate the first number on the number line.
  • To add: move as many steps as the second number to the right.
  • To subtract: move as many steps as the second number to the right.
  • The number you land on is the answer.

Learn more about Number line at:

https://brainly.com/question/24644930

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