**Part 1:** The boxes below are numbered correctly in order from 1-20, but most of the numbers are hidden. Look at the number given, then quickly and carefully count up one more space. Write only the number that goes in the dark box. The example has been done for you.
**Part 2:** Quickly and carefully, count up two more spaces and write only the number that goes in the dark box
**Part 3:** Quickly and carefully, count up three more spaces and write only the number that goes in the dark box.
**Part 4:** Quickly and carefully, count up one, two, or three more spaces and write only the number that goes in the dark box.

## Worksheets for the lesson

Addition up to 20 worksheets pdf download