Multiplication
5 minQuiz at the end
What is Multiplication?
Multiplication is repeated addition β adding the same number multiple times.
4 Γ 3 = 4 + 4 + 4 = 12
Symbol: Γ | Result: product
Times Tables
Fluency with times tables (up to 12Γ12) is essential. Key ones to know:
| Γ | 6 | 7 | 8 | 9 |
|---|---|---|---|---|
| 6 | 36 | 42 | 48 | 54 |
| 7 | 42 | 49 | 56 | 63 |
| 8 | 48 | 56 | 64 | 72 |
| 9 | 54 | 63 | 72 | 81 |
Properties
Commutative: a Γ b = b Γ a β 6 Γ 7 = 7 Γ 6 = 42
Associative: (a Γ b) Γ c = a Γ (b Γ c)
Distributive: a Γ (b + c) = aΓb + aΓc
- 6 Γ 14 = 6 Γ 10 + 6 Γ 4 = 60 + 24 = 84
Long Multiplication
245
Γ 12
-----
490 (245 Γ 2)
2450 (245 Γ 10)
-----
2940
Word Problem Clues
each, per, times, product, groups of, total cost, area of