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2–3 digits × 1 digit

Multiplication

Japanese school year: Elementary 3

What you learn

Students practice column multiplication by applying multiplication tables to each place value and handling carries when multiplying multi-digit numbers by a single digit. This skill helps calculate total costs for multiple identical items. Fluency in multiplication tables and column addition makes learning this process straightforward.

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Key points

Split a number into tens 10a10a and ones bb, multiply each by cc, and add them up to get the answer.

(10a+b)×c=10ac+bc(10a + b) \times c = 10ac + bc

In vertical multiplication, calculate from the ones place up and add carries to the next product.

When a digit is 0, remember that 0 times any number is 0, and write down any carried number.

Choose a set to practice.