Math-Subtraction Circles Let's practice our subtraction skills. Solve the math problems in each circle. 1. First, tap the add button to make a copy of the assignment. 2. Tap the draw tool. Choose a color and write an answer for each math problem. 3. Now, tap the microphone tool to record your voice as you explain the math problems and the answers. 4. Last, tap the green check to add to your journal.