multiplication

Everyday

1. (maths) Adding the same number again and again in a quick way; the operation shown by the sign ×. tree →
2. A big increase in number (the multiplication of germs). tree →

In the lessons

In maths: multiplication tables (times tables), multiplication facts. 3 × 4 means three groups of four, which is 12. In science: the multiplication of bacteria or cells. Phrases: times tables, multiplication sign, long multiplication.

Examples

• Multiplication is a fast way of adding equal groups. tree →
• 6 × 7 = 42 is a multiplication fact. tree →
• We practise our multiplication tables every day. tree →
• Long multiplication helps with big numbers. tree →
• The sign for multiplication is ×. tree →
• Bacteria grow by quick multiplication. tree →
• 4 bags of 5 apples: the multiplication 4 × 5 gives 20 apples. tree →

Note

Verb: multiply (multiplied); the answer is the product. Words in problems that mean multiplication: times, each, every, groups of, rows of, per, double (× 2), triple (× 3). Order does not matter: 3 × 4 = 4 × 3. Multiplying by 0 gives 0; by 1 gives the same number. Myth: multiplying does not always make bigger — × 0.5 makes smaller.