2007-09-03 09:49:04 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
A number line is a line on which there are numbers. The line may show positive and negative integers and may be used to assist with addition and subtraction.
A sample number line is shown below.
-4"""-3"""-2"""-1"""0"""1"""2"""3"""4
A question such as 2 - 5 may be answered by starting at zero , moving 2 to right and then 5 left.
Finishing point is at - 3.
Thus 2 - 5 = - 3
2007-09-07 07:30:46 · answer #1 · answered by Como 7 · 0⤊ 0⤋
Simply a line with numbers on it. It can be used to explain math problems.
An example of a number line (imagine the numbers and words are below the "tick" marks)...
<-I-----I-----I----I----I-----I-----I---> What is -2 plus 5?
-2 -1 0 1 2 3 4
Another example is a timeline:
---I-----------I-----------------I-----------I--------------I----->
born school married children retire
2007-09-03 11:51:06 · answer #2 · answered by Smarty-Marti 5 · 0⤊ 0⤋