Unit Review: Operations with scientific notation

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

1. 1
   $(8\times 10^{-1})\times (6\times 10^3)=$ 
2. 2
   $(6.4\times 10^{-2})\times (3.4\times 10^4)=$ 
3. 3
   $(1.1\times 10^{-6})\times (6\times 10^{-1})=$ 
4. 4
   $(2.9\times 10^5)\times (1.6\times 10^3)=$ 

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

1. 5
   $\frac{1.59\times 10^7}{5.3\times 10^{-1}}=$ 
2. 6
   $\frac{8.32\times 10^{-1}}{6.4\times 10^3}=$ 
3. 7
   $\frac{7\times 10^1}{1.4\times 10^7}=$ 
4. 8
   $\frac{4.2\times 10^{-1}}{6\times 10^{-1}}=$ 

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

1. 9
   $(4\times 10^5)+(1\times 10^5)=$ 
2. 10
   $(2\times 10^7)-(3\times 10^6)=$ 

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

1. 11
   $(2\times 10^2)+(6.5\times 10^2)=$ 
2. 12
   $(6\times 10^7)-(4.4\times 10^7)=$ 

B.4Write each answer in scientific notation.

1. 13
   Light travels about $3\times 10^{12}$ kilometers in a year. How many kilometers does it travel in $8.3\times 10^3$ years?
2. 14
   Light travels about $2\times 10^{12}$ kilometers in a year. How many kilometers does it travel in $3.8\times 10^3$ years?
3. 15
   Light travels about $6\times 10^{10}$ kilometers in a year. How many kilometers does it travel in $8.2\times 10^3$ years?
4. 16
   A grain of sand has a mass of about $1\times 10^{-5}$ gram. What is the mass of $3.1\times 10^3$ grains?

B.5Write each answer in scientific notation.

1. 17
   $\frac{4\times 10^7}{5\times 10^{-2}}=$ 
2. 18
   $\frac{2.1\times 10^{10}}{7\times 10^3}=$ 
3. 19
   $\frac{1.92\times 10^{11}}{4\times 10^8}=$ 
4. 20
   $\frac{1.88\times 10^1}{9.4\times 10^5}=$ 

B.1Multiply in Scientific Notation

1. 1$4.8\times 10^3$
2. 2$2.176\times 10^3$
3. 3$6.6\times 10^{-7}$
4. 4$4.64\times 10^8$

B.2Divide in Scientific Notation

1. 5$3\times 10^7$
2. 6$1.3\times 10^{-4}$
3. 7$5\times 10^{-6}$
4. 8$7\times 10^{-1}$

B.3Add & Subtract in Scientific Notation

1. 9$5\times 10^5$
2. 10$1.7\times 10^7$
3. 11$8.5\times 10^2$
4. 12$1.6\times 10^7$

B.4Scientific Notation Word Problems

1. 13$2.49\times 10^{16}$
2. 14$7.6\times 10^{15}$
3. 15$4.92\times 10^{14}$
4. 16$3.1\times 10^{-2}$

B.5Scientific Notation Operations Review

1. 17$8\times 10^8$
2. 18$3\times 10^6$
3. 19$4.8\times 10^2$
4. 20$2\times 10^{-5}$