A certificate of completion to celebrate the student's success in mastering the "10 more and 10 less" unit.

A mixed practice worksheet including mental math "input/output" boxes, finding the starting number in +10/-10 equations, and a simple word problem.

A second mystery picture worksheet mixing "10 more" and "10 less" clues to reveal a different robot-related object on a partially blank 100s chart.

A worksheet that uses base ten block visual aids to teach the concept of "10 less" by having students cross out a ten rod and calculate the remaining total.

A horizontal equation worksheet where students practice adding 10 to and subtracting 10 from various two-digit numbers.