Teachers, save “Subtracting within 1000 - Count Up on an…” to assign it to your class.

1. Tap 2. Read the problem in the yellow section at the top of the page. 3. Use the tool to circle the related fact from the purple section of the page that will help you solve the subtraction problem at the top of the page. 4. Use the tool to solve the problem by counting up on an open number line. 5. Press to post to your journal.