On the division of the same base power 1. The speed of light is about 3 times 10 km / s. if the distance between the earth and the sun is 1.5 times 10 km / s, how long does it take for the sun to reach the earth? 2. A city has put forward the goal of today's economic development to about one million citizens of the city: "more than 10 billion, strive for a well-off life. What is the per capita target? 3. Fold a piece of paper with a thickness of 0.1 mm in half for 20 times. How many times of the thickness of 128 pieces of the same paper?

On the division of the same base power 1. The speed of light is about 3 times 10 km / s. if the distance between the earth and the sun is 1.5 times 10 km / s, how long does it take for the sun to reach the earth? 2. A city has put forward the goal of today's economic development to about one million citizens of the city: "more than 10 billion, strive for a well-off life. What is the per capita target? 3. Fold a piece of paper with a thickness of 0.1 mm in half for 20 times. How many times of the thickness of 128 pieces of the same paper?

(1.5*10^11)/(3*10^5)=5*10^5s
(10^10)/(10^6)=10^4
(0.1mm*2^20)/(2^7)=0.1mm*(2^13)
^Refers to the power