number line - a line on which numbers are marked at intervals, used to order numbers. Smaller numbers are on the left and larger numbers are on the right.
Free Counting on a Number Line Calculator - Shows addition or subtraction by moving left or right on a number line.
Free Number Line Calculator - Counts from a point going left and right on a number line
Free Number Line Midpoint Calculator - Calculates a midpoint between 2 points on a number line or finds the second endpoint if one endpoint and midpoint are given.
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