Addition Level 6: 2d + 2d (no carry). answer-window addition. 1. Fill tens46 + 32Step 1: Fill tens46plus327raw windows4 + 3 = 7 then release 7running strip7Tens window: 4 + 3 = 7. Release 7.2. Fill onesStep 2: Fill ones46plus3278raw windows6 + 2 = 8 then release 8running strip78Ones window: 6 + 2 = 8. Release 8.
