Twice — Definition, Formula & Examples
Twice means two times a number or amount. If you have twice as many apples as your friend, you have double what they have.
The term "twice" denotes multiplication of a quantity by the factor 2, producing a result equal to the sum of that quantity with itself.
Key Formula
Where:
- = the original number or amount
Worked Example
Problem: Sam has 7 stickers. Maria has twice as many stickers as Sam. How many stickers does Maria have?
Set up: "Twice as many" means multiply Sam's stickers by 2.
Multiply: Calculate the product.
Answer: Maria has 14 stickers.
Why It Matters
Word problems in elementary math often use the word "twice" instead of writing "multiply by 2." Recognizing this word helps you translate everyday language into math operations quickly and correctly.
Common Mistakes
Mistake: Adding 2 to a number instead of multiplying by 2.
Correction: Twice means "two times," not "two more." Twice 5 is 10, not 7.