Tag: mental additions and subtractions

Questions Related to mental additions and subtractions

Sum of greatest three digit number and smallest five digit number is 

maths operations adding and subtracting numbers using place value addition & subtraction mental additions and subtractions

  1. $10999$

  2. $1999$

  3. $19990$

  4. $10099$

Show answer
Correct Option: A
Explanation:

Smallest three digit number $=999$

Greatest five digit number $=10000$
Sum $=999+10000=10999$
So option $A$ is correct.

A girl goes $30$ meters North, then turns right and walks $40$ meters, then turns right and walks $20$ meters, then again turns right and walks $40$ meters. How many meters is she from the original position?

maths operations adding and subtracting numbers using place value addition & subtraction mental additions and subtractions

  1. $0$ meter

  2. $40$ meter

  3. $20$ meter

  4. $10$ meter

Show answer
Correct Option: D
Explanation:
First goes $30$ m north
Then turn right and go $40$ m
Then turn right and go $20$ m
Then turn right and go $40$ m
Finally, distance from starting point $= 30 - 20 = 10$ m

Fill in the blanks by using appropriate alternative:
6409*2 + 28764* = _______

maths operations adding and subtracting numbers using place value addition & subtraction mental additions and subtractions

  1. 928779

  2. 838879

  3. 928879

  4. 928579

Show answer
Correct Option: D

Fill in the blanks by using appropriate alternative:
370500 - 280575 = _______

maths operations adding and subtracting numbers using place value addition & subtraction mental additions and subtractions

  1. 89725

  2. 89952

  3. 89825

  4. 89925

Show answer
Correct Option: D

Fill in the blanks by using appropriate alternative:
_________ - 452567 = 253510

maths operations adding and subtracting numbers using place value addition & subtraction mental additions and subtractions

  1. 706087

  2. 708087

  3. 706077

  4. 706057

Show answer
Correct Option: C

If three is subtracted from each of the following numbers, then which of the following options is the difference between the second highest number and the second digit of the highest number?
$489$     $541$     $654$      $935$       $873$.

maths operations adding and subtracting numbers using place value addition & subtraction mental additions and subtractions

  1. $0$

  2. $3$

  3. $1$

  4. $4$

Show answer
Correct Option: D
Explanation:
Given Numbers  489  541  654  935  873
 Subtraction  -3  -3  -3  -3  -3
 Required Numbers  486  538  651  932  870

Highest Number $\rightarrow$ $932$

Second digit of $932$  $\rightarrow$ $3$
Second highest Number $\rightarrow$ $870$
Second digit of $870$ $\rightarrow$  $7$ 
Difference between 7 and 3 $\rightarrow$ $4$
Hence, the required answer is $4$.

The population of a city is $2,09,32,714$. Out of these, $90,47,314$ are men; $984,35,784$ are women and the rest are children. Find the number of children in the city.

maths operations adding and subtracting numbers using place value addition & subtraction mental additions and subtractions

  1. $34,94,616$

  2. $34,49,616$

  3. $34,49,661$

  4. $34,94,661$

Show answer
Correct Option: B
Explanation:

Population of City $\rightarrow$ Number of Men $+$ Number of Women $+$ Number of Children

Population of city $\rightarrow$ $2,09,32,714$
Number of Men $\rightarrow$ $90,47,314$
Number of Women $\rightarrow$ $84,35,784$
$2,09,32,714$ $\rightarrow$  $90,47,314$ $+$ $84,35,784$ $+$ Number of children
Number of Children $\rightarrow$ $3449616$
Hence, Option B is correct.

Select the INCORRECT statement.

maths operations adding and subtracting numbers using place value addition & subtraction mental additions and subtractions

  1. Tina has $1556$cm long cloth. She cut $13$m $50$cm from it. The length of cloth left with her is $2.06$m

  2. Neetu bought $500$g potatoes, $250$g capsicums, $700$g onions, $500$g tomatoes, $100$g gingers and $300$g radish. The total weight of the vegetables she bought is $2.350$kg

  3. Rita got Rs. $500$ and spent Rs. $117.35$ on stationary items and Rs. $50.75$ on eatables. The amount left with Rita is Rs. $331.09$

  4. Yashika has to cover a distance of $20$km $50$m. She walked $1$km and went by bus for $15$km and hired an auto for rest of the distance. The distance she covered by auto is $4.05$km

Show answer
Correct Option: C
Explanation:

(A) Total length of cloth Tina had $=1566$cm $=15.56$m
Length of cloth she cut from it $=13$m $50$cm
$=13.50$m
$\therefore$ Length of cloth left with her $=15.56-13.50$
$=2.06$m
(B) Total weight of vegetables Neetu bought $=500g+250g+700g+500g+100g+300g=2350$g i.e., $2.350$kg
(C) Total amount spent by Rita$=Rs. (117.35+50.75)=Rs. 168.10$
Amount left will Rita $=Rs. (500-168.10)$
$=Rs. 331.90$
(D) Total distance covered by Yashika $=20$km $50$m $=20.050$km
Distance covered by auto $=20.050-(1+15)=20.050-16=4.05$km
So, option (C) is incorrect.

Rita's watch was 10 minutes fast.Her watch showed 1:05 p.m.when she left home.She travelled for 35 minutes and arrived 5 minutes early for her dental appointment.At what time was her dental appointment?

maths operations adding and subtracting numbers using place value addition & subtraction mental additions and subtractions

  1. 13 : 20 hrs

  2. 13 : 25 hrs

  3. 13 : 35 hrs

  4. 13 : 55 hrs

Show answer
Correct Option: C
Explanation:

Rita's watch was 10 min fast 

when she left home her watch shows time 1:05 p. m
then actual time when she left home is=$ 1:05 p.m.-10 min=12:55 p.m.$
now she travelled 35 min then the time goes to=$ 12:55 p.m.+35 min= 13:30 p.m.$
now she reach at dental hospital 5 min. before the,
actual time was her dental appointment= $13:30 p.m.+5min.=13:35$ hrs


$2\ +\ 3\ =?$

maths operations adding and subtracting numbers using place value addition & subtraction mental additions and subtractions

  1. $0$

  2. $2$

  3. $5$

  4. $4$

Show answer
Correct Option: C
Explanation:

$2+3=5$