Tag: addition and subtraction of decimals

Questions Related to addition and subtraction of decimals

$617 + 6.017 + 0.617 + 6.0017 =$?

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

  1. $6.2963$

  2. $62.965$

  3. $629.6357$

  4. None of these

Show answer
Correct Option: C
Explanation:

 $617.00$
     $6.017$
     $0.617$
$+$ $6.0017$
-----------------
  $629.6357$
-----------------

Solve the given expression:
$3.005+4.7$

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

  1. $3.052$

  2. $3.475$

  3. $7.705$

  4. $3.007$

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Correct Option: C
Explanation:

Addition of $3.005$ and $4.7$ gives $3.005+4.7=7.705$

Find the sum of $1.2$ and $2.3$.

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

  1. $35$

  2. $3.5$

  3. $0.35$

  4. $1.23$

Show answer
Correct Option: B
Explanation:

The sum of $1.2$ and $2.3$ will be $1.2+2.3=3.5$

A couple has five married sons and each one of them have four children. How many members are there in the family?

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

  1. 10

  2. 27

  3. 30

  4. 32

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Correct Option: D
Explanation:

Total member =2[2+(5×2)+(5×4)]=32

$2.\bar {3}-0.\bar {4}=$______.

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

  1. $1.\bar {9}$

  2. $1.\bar {8}$

  3. $1.\bar {7}$

  4. $1.\bar {6}$

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Correct Option: A
Explanation:

$2.\bar{3}-0.\bar{4}=1.\bar{9}$

A train leaves the station at $8:15$ pm and reach destination at $6:25$ am . The duration of the journey is 

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

  1. $10$ hours $15$ minutes

  2. $9$ hours $25$ minutes

  3. $10$ hours $10$ minutes

  4. $9$ hours $40$ minutes

Show answer
Correct Option: C
Explanation:

The time interval between $8:15$ pm and $6:25 am$ = $10\,\, hrs\,\, 10\,\, min$


Therefore, the duration of the journey of the train is $10\,\, hr \,\,10\,\, min.$

Therefore, option C is correct.

Find the value of $\dfrac{2}3+\dfrac {4}{3}+\dfrac{4}{5}+\dfrac{6}{5}$

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

  1. 4

  2. 6

  3. -4

  4. -7

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Correct Option: A
Explanation:

$\dfrac 23+\dfrac 43+\dfrac 45+\dfrac 65\\dfrac {2+4}3+\dfrac {4+6}5\2+2=4$

Expressing $0.\overline { 23 } +0.2\overline { 3 } $ as a single decimal, we get

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

  1. $0.46\bar { 5 } $

  2. $0.4\overline { 65 } $

  3. $0.\bar { 465 } $

  4. none of these

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Correct Option: B
Explanation:

$\Rightarrow$  $0.\overline {23}$ means $0.232323....$


and $0.2\bar{3}$ means $0.233333...$

$\Rightarrow$  $0.\overline {23}+0.{2\bar3}=0.23232323+0.23333333$
                            $=0.4656565$

                            $=0.4\overline {65}$

Evaluate : $0.75 - 0.0075$.

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

  1. $0.7405$

  2. $0.7425$

  3. $0.7415$

  4. $0.7525$

Show answer
Correct Option: B
Explanation:

    $0.7500$
$-   0.0075$
______
    $0.7425$
______
$\therefore$  Required difference $= 0.7425$.

$301.01 - 0.101 = x + 198.01$

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

  1. $103.119$

  2. $103.101$

  3. $102.901$

  4. $102.899$

Show answer
Correct Option: D
Explanation:

$x = 301.01 - 0.101 - 198.01$
   $= 301.01 - 198.111 = 102.899$