number line

so this is a number line  l   2   3   4   5     6    7      8   9      10      11      12         13
] so that is number you can plus and minus ausally on these kinds of lines like4 this one [1 2 3 4 5 6 7 8 9 10 11 12 13] And if you do 12 minus three on my number line you find 12 and go back you sing the numbers untell you gone three THE END