Mental Math Class 5 Worksheet – Fractions
Mental Math Class 5 Worksheet Chapter Number. Here in this page we have given total 26 Questions Set with Solution for Students.
(Q1) Find the numerical value of fractional number three – fourth?
Solution:
Fractional number – three – fourth is 3/4
(Q2) Express 9/2 as mixed fraction?
Solution:
Mixed fraction is whole number and proper fraction combination.
9/2 = 4 1/2 is mixed fraction.
(Q3) Convert 3/7 in the form having numerator 21
Solution:
We have to given, fraction 3/7 we required numerator 21
∴ 3×7/7×7 = 21/49
∴ The new fraction having numerator 21 is 21/49
(Q4) Convert 2/5 in the form having denominator 30.
Solution:
Given that, 2/5 fraction convert into denominator 30.
2×6/5×6 = 12/30
∴ The new fraction having denominator 30 is 12/30
(Q5) Find fraction of shaded portion.
Solution:
Given, there are total 4 parts.
In that 2 part are shaded.
∴ Fraction of shade region is 2/4 = 1/2
(Q6) Find fraction of unshaded region.
Solution:
Given, there are total 6 parts.
In that, 4 parts are unshaded.
∴ Fraction of unshaded region = 4/6 = 2/3
(Q7) Find fraction of unshaded region.
Solution:
There are total 9 parts.
In that 4 parts unshaded.
∴ Fraction of unshaded region = 4/9
(Q8) Find fraction of shaded region.
Solution:
There are total 4 parts.
In that, 3 parts are shaded.
∴ Fraction of shaded region = 3/4
(Q9) Find value 2/5 of 100?
Solution:
2/5 of 100 = 2/5 × 100
= 200/5
= 40
∴ Value of 2/5×100 = 40
(Q10) Find value of 3/4 of 1000?
Solution:
3/4 of 1000 = 3/4 × 1000
= 3000/4
= 750
Value of 3/4 × 1000 = 750
(Q11) Arrange the fractions in ascending order.
3/4, 6/4, 9/4, 2/4
Solution:
We know,
When denominator is same, the numerator of those fraction is greater that fraction is greater
∴ Ascending order of fractions are
2/4, 3/4, 6/4, 9/4
(Q12) Arrange in descending order.
5/8, 4/8, 2/8, 10/8
Solution:
We know,
When denominator is same, the greater numerator that fraction is greater.
∴ Desending order of fractions arc
10/8, 5/8, 4/8, 2/8
(Q13) Find 2/5 of 3 kilogram?
Solution:
We know, 3 kilogram = 3000 grams.
∴ 2/5 × 3000 gm = 6000gm/5
= 1200gm
2/5 of 3kg = 1kg and 200gm
(Q14) Find 3/4 of 500 rupees?
Solution:
We have to find,
3/4 of 500 rupees.
∴ 3/4 × 500 = 1500/4
∴ 3/4 of 500 = 375
(Q15) Find 3/5 of 100 centimeter?
Solution:
We have to find,
3/5 of 100 cm = 3/5 × 100 cm
= 300/5 cm
= 60 cm
∴ 3/5 of 100 cm = 60 cm
(Q16) Find reciprocal of 3 2/6?
Solution:
1st we convert mixed fraction
3 2/6 = (3×6)+2/6 = 20/6
∴ Reciprocal of 20/6 is 6/20
(Q17) Find sum of 3/8 and 9/8
Solution:
When we done sum & subtraction of fractions, denominator is always same.
∴ 3/8 + 9/8 = 12/8
By simplifying 12/8 is 3/2
∴ 3/8 + 9/8 is 3/2
(Q18) Find subtraction of 3/2 and 1/2
Solution:
Doing subtraction of fractions, denominator is always same.
∴ 3/2 – 1/2 = 2/2 = 1
∴ 3/2 – 1/2 = 1
(Q19) Find reciprocal of 3 4/9?
Solution:
1st we convert mixed fraction.
3 4/9 = (9×3)+4/9 = 27+4/9 = 31/9
∴ Reciprocal of 31/9 is 9/31
(Q20) Find 4 3/5 + 2 9/5
Solution:
1st we convert, mixed fraction
3 4/5 = (3×5)+4/5 = 19/5
Now, let ‘x’ added to 2/5 to get 19/5
x + 2/5 = 19/5
x = 19/5 – 2/5
x = 17/5
∴ 17/5 added to 2/5 to get 3 4/5
(Q21) How much should be added to 2/5 to get 3 4/5
Solution:
1st we convert, mixed fraction.
3 4/5 = (3×5)+4/5 = 19/5
Now, let ‘x’ added to 2/5 to get 19/5
x + 2/5 = 19/5
x = 19/5 – 2/5
x = 17/5
∴ 17/5 added to 2/5 to get 3 4/5.
(Q22) 3 days are how much part of 15 days?
Solution:
We have to given, total 15 days and in that we have to find 3 days.
∴ The fraction we get is 3 days/15 days 1/5
∴ 3 days are the 1/5th par of 15 days.
(Q23) 30 hours is how many part of 5 days?
Solution:
We know, 1 day = 24 hours
∴ Given, 5 days = 24×5 = 120 hours
We have to find 30 hours of total 120 hours in fraction.
30hour/120hour = 1/2
∴ 30 hour is 1/4th part of 5 days.
(Q24) How many minutes in 5/2 hours.
Solution:
We know, 1 hour = 60 minutes
∴ 5/2 minutes = 5/2 × 60 minute
= 300/2 = 150 minutes
∴ In 5/2 hours there are 150 minutes.
(Q25) Find value of 4/5 × 5/4
Solution:
4/5 × 5/4
By eliminating 4/5 × 5/4 we get 1.
∴ 4/5 × 5/4 = 1
(Q26) What should be added to 2/5 to make it 2?
Solution:
Let, we add ‘x’ to 2/5 to get 2.
x + 2/5 = 2
x = 2/1 – 2/5
We make denominator same
∴ x = 10-2/5
= x = 8/5
8/5 = 1 3/5
We add 8/5 [1 3/5] to 2/5 to make 2.