Mental Math Class 5 Worksheet – Operations on Numbers
Mental Math Class 5 Worksheet Chapter Number. Here in this page we have given total 25 Questions Set with Solution for Students.
(Q1) Find value of ‘x’?
5237 + 2348 = x
Solution:
There is subtraction
Answer is 2889.
(Q2) Find value of ‘x’?
4387 + x = 5938
Solution:
Here, we have to find value of ‘x’
x = 5938 – 4387
x = 1551
(Q3) Find value of ‘x’?
5328 + 230 – x = 9370
Solution:
First, we add 5328 + 230 & Then we subtracted this value from 9370.
We subtract 5558 from 9370
x = 3812
(Q4) Find value of ‘x’?
625 ÷ 5 = x
Solution:
Here is division.
625/5
x = 125
(Q5) Find ‘x’ if 5000 + 200 + 20 + 6 = x
Solution:
Here we doing addition
x = 5226
(Q6) 43 × 5 – 6 + 8 =?
Solution:
Here, we making bracket.
(43×5) – 6 + 8
(43×5) + 2
= 215 + 2
= 217
Answer is 217
(Q7) Which value we get when we subtracted 56 from 99?
Solution: Here, we have to do subtraction.
99
– 56
________
43
We get 43 when we subtracted 56 from 99.
(Q8) Rahul bought 6 book of Rs 80 and 8 note books of Rs 100. How many amount Rahul pay to shopkeeper?
Solution:
Rahul Bought 6 books of Rs 80
Rahul bought 8 notebook of Rs 100
Amount pay to shopkeeper is,
We have to add Rs 80 & Rs 100
80 + 100 = 180
∴ Rahul pay to shopkeeper is Rs 180
(Q9) Madhuri reads 9 pages daily from a book having 180 pages. After 15 days, how many pages remains unread?
Solution:
The Book is having 180 pages.
Madhuri reads 9 pages daily.
Then in 15 days she reads
15×9 = 135 pages
Then, page remains unreads,
We subtract 135 from 180.
(180-135) = 45
= 45 page unread
(Q10) There are 12 books in 1 box, then find total books in 15 boxes?
Solution:
There are 12 books in 1 box.
Then in 15 boxes
We have to do multiplication,
15×12 = 180
∴ There are 180 books in 15 boxes.
(Q11) How many sides in 4 triangles?
Solution:
There are 3 sides to a triangle.
Then sides in 4 traingle.
Then, sides in 4 traingles is,
3×4 = 12 sides
There are 12 sides in 4 traingles.
(Q12) How many sides in 8 Hexagoans?
Solution:
There are 6 sides to a Hexagoans.
Then, sides in 8 Hexagoans is
8×6 = 48 sides
There are 48 sides in 8 hexagoans.
(Q13) How many minutes in 1440 seconds?
Solution:
We know, 60 seconds = 1 minute then,
Minutes in 1440 seconds, we are dividing
1440 seconds by 60 seconds
= 1440/60 = 24 minutes
There is 24 minutes in 1440 seconds.
(Q14) The monthly salary of Ram is Rs 2000. Then find six month salary of Ram?
Solution:
The monthly salary of Ram is Rs 2000
Then, six month salary is,
We have to multiply 2000 by 6 = (2000×6) = 12,000
The six month salary of Ram is 12000
(Q15) Find differences between 149 and 99?
Solution:
Here we have to do subtraction
(149 – 99) = 50
Answer is 50
(Q16) What should be added in 94 to get 250?
Solution:
Let, we add x in 94 to get 250
x + 94 = 250
Then, x = 250 – 94
x = 156
156 added in 94 to get 250
(Q17) A cycle cost is Rs 6500. Find value of 5 cycles?
Solution:
A cycle cost is Rs 6500
We have to find cost of 5 cycles
Then, we are doing multiplication,
6500 × 5 = 32,500
The cost of 5 cycles is Rs 32,500
(Q18) If x + x + x + x + x = 200 then find value of ‘x’?
Solution:
Here, there are ‘5’ x
Then 5x = 200
x = 200/5
x = 40
Value of x is 40
(Q19) 7 dozen is how many in numbers?
Solution:
We know, 1 dozen is equal to 12
Then, we have to find 7 dozen,
We multiply 12 by 7
(12 × 7) = 84
∴ 7 dozen = 84
(Q20) If 20 + 85 = 105 then 2000 + 8500 =?
Solution:
Here we have to do addition.
2000 + 8500
= (2000 + 8500) = 10500
We get 10,500
(Q21) Find value of ‘y’
If 623 + 420 + y = 1680
Solution:
We first add 623 + 420 then value we get subtracted from 1680.
We have subtracted 1043 from,
(Q22) In garden, there are 20 mango trees, 50 Neem trees, and 55 coconut trees then find total number of trees in garden?
Solution:
In Garden mango tree = 20
Neem Tree = 50
Coconut Tree = 55
Total No. of trees = we have to add 20 + 50 + 55
(20+50+55) = 125
Trees there are 125 trees in garden.
(Q23) Find ‘y’ if 250 + y = 1250
Solution:
We have to find value of y.
y = 1250 – 250
y = 1000
(Q24) Find 320 × 0 + 624 =?
Solution:
∴ We know, any number multiply with ‘0’ we get value is ‘0’
∴ 320 × 0 = 0
0 + 624 = 624
Answer we get 0+624 = 624
(Q25) There are 25 rooms in hotel and each room there are 25 beds then find total number of beds in hotel?
Solution:
There are 25 rooms in hotel.
And each room contains 25 beds.
Then, we have to find,
Total no. of beds in hotel is
We have to do multiplication.
25×25 = 625
∴ There are 625 beds in Hotel.