Scroll:Number theory >> Scientific notation >> saq (3893)

Written Instructions:

For each Multiple Choice Question (MCQ), four options are given. One of them is the correct answer. Make your choice (1,2,3 or 4). Write your answers in the brackets provided..

For each Short Answer Question(SAQ) and Long Answer Question(LAQ), write your answers in the blanks provided.

Leave your answers in the simplest form or correct to two decimal places.


 

1)  

 How do you write 7700 in scientific notation

 × 10


Answer:_______________




2)  

 How do you write 518 in scientific notation

 × 10


Answer:_______________




3)  

 How do you write

7.73 × 10
5

in standard form


Answer:_______________




4)  

 How do you write

8.7 × 10
1

in standard form


Answer:_______________




5)  

 How do you write 2,766 in scientific notation

 × 10


Answer:_______________




6)  

 How do you write 8800 in scientific notation

 × 10


Answer:_______________




7)  

 How do you write 666 in scientific notation

 × 10


Answer:_______________




8)  

 How do you write

5.61 × 10
5

in standard form


Answer:_______________




9)  

 How do you write

6.3 × 10
1

in standard form


Answer:_______________




10)  

 How do you write 7,499 in scientific notation

 × 10


Answer:_______________




 

1)  

 How do you write 7700 in scientific notation

Answer: 7.7 × 10
Answer: 3


SOLUTION 1 :

Remember:

The first factor must be at least 1 and less than 10.
The second factor must be a power of 10.

Solve:

Move the decimal point to the left until the number is between 1 and 10. Count how many places you move the decimal point.
7,700 → 7.7

You moved the decimal point 3 places to the left. The power of 10 is 103.

7,700 = 7.7 x 103



2)  

 How do you write 518 in scientific notation

Answer: 5.18 × 10
Answer: 2


SOLUTION 1 :

 Remember:

The first factor must be at least 1 and less than 10.
The second factor must be a power of 10.

Solve:

Move the decimal point to the left until the number is between 1 and 10. Count how many places you move the decimal point.
518 → 5.18

You moved the decimal point 2 places to the left. The power of 10 is 102.

518 = 5.18 x 102



3)  

 How do you write

7.73 × 10
5

in standard form

Answer: 773000


SOLUTION 1 :

 Remember:

The power of 10 tells you how many places to the right to move the decimal point.

Solve:

 You want to move the decimal point 5 places to the right. First, write extra zeroes to the right of the decimal point. Remember that writing extra zeroes to the right of a decimal does not change its value.

 

7.73 = 7.73000


Now move the decimal point 5 places to the right.

7.73000 → 773000

7.73 × 105 = 773000

 



4)  

 How do you write

8.7 × 10
1

in standard form

Answer: 87


SOLUTION 1 :

 Remember:

The power of 10 tells you how many places to the right to move the decimal point.

Solve:

 

Look at 101. The 10 is raised to the power of 1. Move the decimal point 1 place to the right.

 

8.7 →  87.

8.7 × 101 = 87

 



5)  

 How do you write 2,766 in scientific notation

Answer: 2.766 × 10
Answer: 3


SOLUTION 1 :

Remember:

The first factor must be at least 1 and less than 10.
The second factor must be a power of 10.

Solve:

Move the decimal point to the left until the number is between 1 and 10. Count how many places you move the decimal point.
2,766 → 2.766

You moved the decimal point 3 places to the left. The power of 10 is 103.

2,766 = 2.766 x 103



6)  

 How do you write 8800 in scientific notation

Answer: 8.8 × 10
Answer: 3


SOLUTION 1 :

Remember:

The first factor must be at least 1 and less than 10.
The second factor must be a power of 10.

Solve:

Move the decimal point to the left until the number is between 1 and 10. Count how many places you move the decimal point.
8,800 → 8.8

You moved the decimal point 3 places to the left. The power of 10 is 103.

8,800 = 8.8 x 103



7)  

 How do you write 666 in scientific notation

Answer: 6.66 × 10
Answer: 2


SOLUTION 1 :

 Remember:

The first factor must be at least 1 and less than 10.
The second factor must be a power of 10.

Solve:

Move the decimal point to the left until the number is between 1 and 10. Count how many places you move the decimal point.
666 → 6.66

You moved the decimal point 2 places to the left. The power of 10 is 102.

666 = 6.66 x 102



8)  

 How do you write

5.61 × 10
5

in standard form

Answer: 561000


SOLUTION 1 :

 Remember:

The power of 10 tells you how many places to the right to move the decimal point.

Solve:

 You want to move the decimal point 5 places to the right. First, write extra zeroes to the right of the decimal point. Remember that writing extra zeroes to the right of a decimal does not change its value.

 

5.61 = 5.61000


Now move the decimal point 5 places to the right.

5.61000 → 561000

5.61 × 105 = 561000

 



9)  

 How do you write

6.3 × 10
1

in standard form

Answer: 63


SOLUTION 1 :

 Remember:

The power of 10 tells you how many places to the right to move the decimal point.

Solve:

 

Look at 101. The 10 is raised to the power of 1. Move the decimal point 1 place to the right.

 

6.3 →  63.

6.3 × 101 = 63

 



10)  

 How do you write 7,499 in scientific notation

Answer: 7.499 × 10
Answer: 3


SOLUTION 1 :

Remember:

The first factor must be at least 1 and less than 10.
The second factor must be a power of 10.

Solve:

Move the decimal point to the left until the number is between 1 and 10. Count how many places you move the decimal point.
7,499 → 7.499

You moved the decimal point 3 places to the left. The power of 10 is 103.

7,499 = 7.499 x 103