Choose your target operation, digit complexity, and session pacing.
Addition
Summation & partial adds
Subtraction
Difference & borrows
Multiplication
Cross-products & tables
Division
Integer quotient splits
Squares
Base powers & identities
Cubes
Powers of 3 & binomials
Square Roots
Perfect square extraction
Percentages
Benchmark proportions
Mixed Ops
Interleaved arithmetic
No carries / friendly factors
Single carry / borrow steps
Complex regrouping & borrows
Maximum focus & non-round numbers
2-digit dividend divided by 2-digit divisor
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