Teachers, save “Subtraction within 20 (10 pages)” to assign it to your class.

1) Tap 2) Tap the tool. 3) Drag a red "X" over the appropriate number of blue tokens. 4) Drag the correct number over to the math sentence to complete your answer. 5) Read the math sentence out loud and check your work! 6) Tap the tool to submit your work *Optional: Tap the tool to record yourself reading the math sentence out loud.