To celebrate the day of the city, 15 thousand balloons were inflated, a third went to decorate the main street

To celebrate the day of the city, 15 thousand balloons were inflated, a third went to decorate the main street, 3/5 of the remaining balloons were distributed to children, and the rest were launched into the sky. How many balloons were launched into the sky?

Let’s find how many balls it took to decorate the main street, if it was 1/3 of the total – 15,000:
15,000: 3 = 5,000 balls.
Let’s find how many balls were distributed to children, if it was 3/5 of the remaining balls:
(15,000 – 5,000) * 3/5 = 10,000 * 3/5 = 2,000 * 3 = 6,000 balls.
Let’s find how many balloons were launched into the sky:
15,000 – 5,000 – 6,000 = 4,000 balls.
Answer: 4,000 balloons were launched into the sky.