Addition Level 5: 2d + 1d (sum < 100). answer-window addition. 1. Fill tens76 + 8Step 1: Fill tens76plus87raw windows7 + 0 = 7 then release 7running strip7Tens window: 7 + 0 = 7. Hold 7; wait for carry from the next window.2. Fill onesStep 2: Fill ones76plus8714raw windows6 + 8 = 14 then keep 4; carry waitsrunning strip74Ones window: 6 + 8 = 14. Hold raw 14; settle carry later.3. Settle carryStep 3: Settle carryKeep ones; carry moves left.raw windows7 | 14settled digits8 | 4answer 84Settle raw 7 | 14 into 84; keep ones and move carry left.
