What is a double in math? In math, a double can have either of the following two meanings:
For example, 8 + 8 is a double and 2 × 9 is also a double.
John has a yearly salary of 35,000 dollars. His goal is to double his salary after 5 years. What will be John salary after 5 years if he succeeds?
His salary will be 35,000 × 2 or 70,000 dollars
Noemy has a 6 candies. His sister Sarah has the double of what Noemy has. How many candies do they have together?
Sarah has 2 × 6 or 12 candies
Together, they have 6 + 12 or 18 candies