Subtract using the number line.
−1 1/3−1/6
a number line ranging from negative two to two with an arrow on both ends and tick marks every one sixth
−1 5/6
−1 1/2
−1 1/6
1 1/2

Step-by-step explanation:

A part of the number line ranging from -2 to 2 with an arrow on both ends and tick marks every is shown in attached diagram.

Rules:

To subtract using number line, you have to move to the left one mark (because the distance between two consecutive marks is ), so you'll be at point

circumference divided by 3.141592654 then timesthe radius twice

step-by-step explanation:

circumference divided by 3.141592654 then timesthe radius twice