You will use an open number line to round numbers to the nearest 10 and 100. Watch the teacher demonstration on page 1 of the creative canvas. On pages 2 and 3 Label the open number lines for each problem. You will drag and drop the tic mark and the number box to the correct position on the number line. Once the number line is filled out completely, use the or to complete the answer. Press when you have completed pages 2 and 3.