To the left of 0, between -21 on its left and -19 on its right.
Usually 20 units to the left of the origin (or zero point).
55 is the middle number on a number line from 20 to 90.
20
Subtracting a negative is the same as adding a positive, so you would move that many to the right on the number line. For example, 4 - (-20) is the same as 4 + 20, so you would start at 4 and move 20 spaces to the right, and end up with 24 as your answer.
40
It is 20 - (-4) = 20 + 4 = 24
10
To convert a fraction to a decimal you need to divide the numerator (the number above the line) by the denominator (the number below the line). 11/20 = 0.55
It tells you that -20 is 20 spaces away from zero on a number line.
20
20
20