1-50, Number Line Tool for Addition/Subtraction

A printable number line for use while a student is learning to add and subtract.  For best results cover the print with a plastic sheet protector and have the student use the eraser end of a pencil to follow the numbers forward for adding, or backward for subtracting, along the number line.  Even numbers are bolded.  Counting by threes are in blue font.  Counting by fives are in light yellow highlight.  Counting by tens are in bright yellow highlight.