과학적 표기법의 계산 단원 종합

B.1Multiply. Write each answer in scientific notation.

1. 1
   $(9\times 10^2)\times (1.2\times 10^6)=$ 
2. 2
   $(8.7\times 10^{-2})\times (7.6\times 10^{-3})=$ 
3. 3
   $(3\times 10^8)\times (7\times 10^7)=$ 
4. 4
   $(7.3\times 10^{-6})\times (6\times 10^{-5})=$ 

B.2Divide. Write each answer in scientific notation.

1. 5
   $\frac{7.2\times 10^9}{1.8\times 10^7}=$ 
2. 6
   $\frac{7.6\times 10^4}{2\times 10^{-2}}=$ 
3. 7
   $\frac{3.5\times 10^7}{5\times 10^2}=$ 
4. 8
   $\frac{5.31\times 10^4}{9\times 10^4}=$ 

B.3Add or subtract. Write each answer in scientific notation.

1. 9
   $(9.2\times 10^8)-(1.6\times 10^7)=$ 
2. 10
   $(2\times 10^6)-(3.1\times 10^5)=$ 

B.3Add or subtract. Write each answer in scientific notation. (continued)

1. 11
   $(7.2\times 10^5)-(6\times 10^5)=$ 
2. 12
   $(3\times 10^5)+(7\times 10^4)=$ 

B.4Write each answer in scientific notation.

1. 13
   A country has about $4\times 10^8$ people. A city has about $1\times 10^4$ people. How many times as many people live in the country?
2. 14
   A grain of sand has a mass of about $4.4\times 10^{-4}$ gram. What is the mass of $7.6\times 10^4$ grains?
3. 15
   Light travels about $3\times 10^{12}$ kilometers in a year. How many kilometers does it travel in $3.7\times 10^1$ years?
4. 16
   A hard drive holds $3.24\times 10^{12}$ bytes. Each photo uses $3.6\times 10^7$ bytes. How many photos can the drive hold?

B.5Write each answer in scientific notation.

1. 17
   $\frac{2.4\times 10^{12}}{3\times 10^6}=$ 
2. 18
   $\frac{3.8\times 10^{-10}}{9.5\times 10^{-5}}=$ 
3. 19
   $\frac{1.47\times 10^{11}}{2.1\times 10^6}=$ 
4. 20
   $\frac{3.68\times 10^8}{8\times 10^5}=$ 

B.1Multiply in Scientific Notation

1. 1$1.08\times 10^9$
2. 2$6.612\times 10^{-4}$
3. 3$2.1\times 10^{16}$
4. 4$4.38\times 10^{-10}$

B.2Divide in Scientific Notation

1. 5$4\times 10^2$
2. 6$3.8\times 10^6$
3. 7$7\times 10^4$
4. 8$5.9\times 10^{-1}$

B.3Add & Subtract in Scientific Notation

1. 9$9.04\times 10^8$
2. 10$1.69\times 10^6$
3. 11$1.2\times 10^5$
4. 12$3.7\times 10^5$

B.4Scientific Notation Word Problems

1. 13$4\times 10^4$
2. 14$3.344\times 10^1$
3. 15$1.11\times 10^{14}$
4. 16$9\times 10^4$

B.5Scientific Notation Operations Review

1. 17$8\times 10^5$
2. 18$4\times 10^{-6}$
3. 19$7\times 10^4$
4. 20$4.6\times 10^2$