Addition Level 11: 3d + 2d (no carry). answer-window addition. 1. Fill hundreds312 + 45Step 1: Fill hundreds312plus453raw windows3 + 0 = 3 then release 3running strip3Hundreds window: 3 + 0 = 3. Release 3.2. Fill tensStep 2: Fill tens312plus4535raw windows1 + 4 = 5 then release 5running strip35Tens window: 1 + 4 = 5. Release 5.3. Fill onesStep 3: Fill ones312plus45357raw windows2 + 5 = 7 then release 7running strip357Ones window: 2 + 5 = 7. Release 7.
