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🧮 Primary Maths & Science Games · Grades 2-4 · Column addition, subtraction, multiplication, division

Column Method Workshop: Carry, Borrow, Multiply and Divide Step by Step

Local Calculation · Private

Most column-method mistakes are a forgotten carry, a borrowed 1 not taken away, a misaligned partial product or a quotient digit in the wrong place. Here every box is filled in textbook order and a wrong digit tells you exactly which step failed.

👪 For parentsA learning game for primary-school children: no ads on this page and no sign-up. Practice records stay in this browser and are never uploaded. The site only uses basic anonymous visit statistics; see the privacy policy.

How to play

  1. In Explore, choose an operation, type two numbers and press Watch to play the column method step by step (pause, step, speed).
  2. Press I'll try to fill it in yourself: blue boxes light up in textbook order and a wrong digit shows which step went wrong.
  3. Levels has 7 rounds from carrying to long division (3 sums each, stars by mistakes). Parents shows weak spots and prints worksheets.

Curriculum unit

Primary maths, grades 2–4: written addition and subtraction within 10,000, multi-digit × 1-digit, 2-digit × 2-digit, and short and long division (PEP textbook, grade 2–4 units).

For parents and teachers

Mistakes are grouped by type: forgotten carries, borrowing errors, subtracting the smaller digit from the bigger, times-table slips and quotient estimates that are too big or too small. The worksheet picks the weakest level and prints 12 sums with working space and an answer page.

FAQ

Why do we mark a dot when borrowing?
When the ones digit is too small, you borrow 1 ten from the tens column. The dot reminds you that the tens digit is now 1 less, the most common place children slip.
Why does the second row of 2-digit multiplication move one place left?
You are multiplying by tens, so the answer is a number of tens and starts under the tens column.
Where do I write the quotient in long division?
Above the digit you have divided up to. If the part you are dividing is smaller than the divisor, write a 0 there. Each remainder must be less than the divisor.