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Door 5 · Grade 3

🔢 Multiplication Facts (1-10)

Practice all facts from 1x1 to 10x10 daily

▶ Play Door 5

Multiplication Fluency (1x1 to 10x10)

Multiplication is repeated addition. Knowing your times tables up to 10x10 is essential for all higher maths.
Key facts to memorize:
• Any number x 1 = itself (7x1=7)
• Any number x 10 = add a 0 (6x10=60)
• 9x rule: digits of product sum to 9 (9x3=27, 2+7=9)
• 5x rule: ends in 0 or 5 (5x7=35)

Worked example

Problem: 7 x 8 = ?

  1. 56.
  2. 7x8 is one of the trickier facts.
  3. Remember: 56 = 7x8 (5,6,7,8 — the digits go in order!).

Answer: Remember: 56 = 7x8 (5,6,7,8 — the digits go in order!).

Commutative Property of Multiplication

The commutative property means: order does not matter in multiplication.
a x b = b x a
This is useful because you only need to learn half the times table — if you know 7x8=56, you also know 8x7=56.

Worked example

Problem: 5 x 6 = 30. What is 6 x 5?

  1. 6 x 5 = 30.
  2. Commutative property: switching the order gives the same answer.

Answer: Commutative property: switching the order gives the same answer.

Missing Factor Problems

When you know the product (answer) and one factor, you can find the missing factor using division or the times table.
Example: ___ x 6 = 24. Think: what times 6 equals 24? 4 x 6 = 24, so the answer is 4.

Worked example

Problem: ___ x 7 = 35

  1. Think: 7 x what = 35?
  2. Count by 7s: 7,14,21,28,35.
  3. Five 7s = 35.
  4. Or: 35/7 = 5.

Answer: 5.