Third Grade · Math · week 4

The ×2 and ×10 facts

Master ×2 (doubles) and ×10 facts and explain why ×10 just adds a zero.

The ×2 facts are just doubles — the same doubles you already know from adding. 7 × 2 is "double 7," which is 14. If you know your doubles, you already know all your ×2 facts.

The ×10 facts have a pattern you can trust: put a 0 at the end. 7 × 10 = 70, 9 × 10 = 90. That happens because ten of something is one full group in the tens place.

📋 For the teacher
Teach it (10–15 min):
  • Anchor ×2 to doubles they already own from addition — no new work, just a new name.
  • Let them discover the "add a zero" pattern by listing 1×10 through 10×10.
  • Warn gently that ×10 does NOT work by "adding a zero" for bigger multiplications later — but it is perfect for now.
  • Mix ×2 and ×10 in the same minute so they do not blur together.
Talk about it:
  • How are ×2 facts related to doubles?
  • What pattern do all ×10 facts share?
  • Why is 6 × 10 different from 6 × 2?

Mastery looks like: They answer any ×2 or ×10 fact quickly and can explain the zero pattern for ×10.

Common stumbles: Applying "add a zero" to ×2 by mistake (6 × 2 = 60); confusing double with ten.

See it visually

Interactive, spoken-aloud tools that show this idea in motion.

MultiplicationEqual groups and arrays make products finally click.try →
Homework for this lessonType it, write it with a stylus, or print it for pencil & paper.open →
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