Bootcamp step 3

Addition and subtraction

Split the numbers into tens and units, work from left to right, and make the final total feel automatic without dropping back into written methods.

Goal

Pass both modes with five correct runs in a row each to complete the step.

Rank

Trainee

150 XP to Apprentice🔥 Best streak 0

Mental arithmetic

Train both directions, not just one.

Step 3 is only complete when both modes are fluent. Each mode needs a five-in-a-row streak.

Recommendation

Start with addition, then move into subtraction once the pattern feels automatic.

Mode A

Open

Add the tens first, then the units, then lock in the full total.

Best streak

0/5

Mode B

Open

Take away the tens first, then use the signed units adjustment.

Best streak

0/5