Tag: decimal numbers

Questions Related to decimal numbers

Difference of 32 and 27.091 is

maths decimal numbers adding and subtracting decimals addition and subtraction of decimals operations on decimals

  1. 30.791

  2. 5.909

  3. 4.909

  4. 3.909

Show answer
Correct Option: C
Explanation:

32.000-27.091=4.909

So option C is the correct answer.

Sum of $1.8, 16.3$ and $72.985$ is _____ 

maths decimal numbers adding and subtracting decimals addition and subtraction of decimals operations on decimals

  1. $91.85$

  2. $9108.5$

  3. $91.085$

  4. $9.1085$

Show answer
Correct Option: C
Explanation:

For obtaining the sum of decimal numbers with different decimal values we expand the decimal values of all the numbers with respect to the number with the highest decimal value. 


Because the number with the largest decimal places is $72.985$ with $3$ decimal places, we expand all numbers up to $3$ decimal places.

$1.800+16.300+72.985=91.085$

So option C is the correct answer.

Sum of 0.5, 12.56 and 0.003 is

maths decimal numbers adding and subtracting decimals addition and subtraction of decimals operations on decimals

  1. 13.063

  2. 31.063

  3. 12.063

  4. none of these

Show answer
Correct Option: A
Explanation:
We know that to add numbers with different decimal places we expand all the numbers to the same decimal places by expanding zeroes.

So, the sum of 0.5 ,12.56 and 0.003 is

0.500+12.560+0.003 =13.063 

Hence, the answer is 13.063

So, option A is the correct answer.

Which number is equal to $\left (\frac {0.1}{0.01}+\frac {0.01}{0.1}\right )$?

maths decimal numbers adding and subtracting decimals addition and subtraction of decimals operations on decimals

  1. 10.1

  2. 1.10

  3. 1.01

  4. 10.01

Show answer
Correct Option: A
Explanation:

$\frac {0.1}{0.01}+\frac {0.01}{0.1}=10+\frac {1}{10}$
$=10+0.1$
$=10.1$

Sum of $0.3, 0.03$ and $0.003$ is _____ 

maths decimal numbers adding and subtracting decimals addition and subtraction of decimals operations on decimals

  1. $0.999$

  2. $0.393$

  3. $0.636$

  4. $0.333$

Show answer
Correct Option: D
Explanation:

To add $3$ decimal numbers of different decimal values we pick the number with the highest decimal value and expand all the other numbers to the same value by adding $0$ after the decimal point.


$0.300+0.030+0.003=0.333$


So option D is the correct answer!

The sum of two numbers is 31.021 If one of them is 11.56 then the other number is

maths decimal numbers adding and subtracting decimals addition and subtraction of decimals operations on decimals

  1. 19.461

  2. 17.461

  3. 18.641

  4. 19.561

Show answer
Correct Option: A
Explanation:

The sum of two numbers $=31.021$


One of the numbers $=11.560$


Other number $=31.021-11.560=19.461$

So option A is the correct answer.

$\displaystyle 25+\frac{3}{100}+\frac{4}{1000}=$ _________

maths decimal numbers adding and subtracting decimals addition and subtraction of decimals operations on decimals

  1. 25.34

  2. 25.304

  3. 25.034

  4. 25.0034

Show answer
Correct Option: C
Explanation:

$5 + \dfrac { 3}{100} + \dfrac{4}{1000}$

$= 25 + 0.03 + 0.004$
$=25.034$

Which number is equal to $\displaystyle \left ( \frac{0.1}{0.01}+\frac{0.01}{0.1} \right )?$

maths decimal numbers adding and subtracting decimals addition and subtraction of decimals operations on decimals

  1. 10.1

  2. 1.10

  3. 1.01

  4. 10.01

Show answer
Correct Option: A
Explanation:

$\displaystyle \frac{0.1}{0.01}+\frac{0.01}{0.1}=10+\frac{1}{10}$
=10+0.1
=10.1

If $\displaystyle (1-1.25)N=1$, Then N=

maths decimal numbers adding and subtracting decimals addition and subtraction of decimals operations on decimals

  1. -400

  2. -140

  3. -4

  4. 4

  5. 400

Show answer
Correct Option: C
Explanation:

As given,

(-0.25) $\times$ N = 1
$\rightarrow$ N = $\cfrac{1}{-0.25} $ = $-4$ (option C

$3889 + 12.952 - ? = 3854.002$

maths decimal numbers adding and subtracting decimals addition and subtraction of decimals operations on decimals

  1. $47.095$

  2. $47.752$

  3. $47.932$

  4. $47.95$

Show answer
Correct Option: D
Explanation:

Let $3889 + 12.952 - x = 3854.002$.
Then $x=\left( 3889+12.952 \right) -3854.002$
             $= 3901.952 - 3854.002$
             $= 47.95$.