Pular para o conteúdo da ferramenta
Minhas ferramentas

🧮 Jogos de matemática e ciências do ensino fundamental · 2.º ao 4.º ano · Contas armadas

Oficina de contas armadas: vai um, empréstimo, multiplicação e divisão passo a passo

Cálculo local · Privado

ⓘ Os textos do jogo estão em inglês.

Cada casa é preenchida na ordem do livro; um algarismo errado mostra exatamente qual passo falhou.

👪 Para os paisJogo educativo para o ensino fundamental: sem anúncios nesta página e sem cadastro. Os registros de prática ficam neste navegador e nunca são enviados. O site usa apenas estatísticas anônimas básicas; veja a política de privacidade.

Como jogar

  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.

Unidade do currículo

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).

Para pais e professores

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.

Perguntas frequentes

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.