Multiply by Tens
Aligned to 3.NBT.A.3 — Common Core State Standards for Mathematics.
What this lesson teaches
To multiply a number by a multiple of 10, first multiply the easy fact, then add one zero to the end.
Worked example
Find 6 × 40. First think 6 × 4 = 24. Then add a zero: 6 × 40 = 240.
Practice questions
- Solve 3 × 50.
- Solve 7 × 20.
- Solve 9 × 30.
Watch the lesson
Every lesson comes with a video taught in English and Spanish — the same video the QR code in the printed workbook opens.
▶ Watch this lessonEn español
Multiplicar por Decenas
Para multiplicar un número por un múltiplo de 10, primero multiplica el hecho fácil y luego agrega un cero al final.
Ejemplo: Halla 6 × 40. Primero piensa 6 × 4 = 24. Luego agrega un cero: 6 × 40 = 240.
More Number & Operations in Base Ten lessons
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