Mental Math Class 5 Worksheet – Conversion
Mental Math Class 5 Worksheet Chapter Number. Here in this page we have given total 25 Questions Set with Solution for Students.
(Q1) Convert 360 minutes in hours?
Solution:
We know, 1 hour = 60 minutes
∴ We divide 360 minutes to 60 to gets hours.
360/60 = 6 hours
∴ 360 minutes = 6 hours
(Q2) Convert 15 minutes into seconds?
Solution:
We know, 1 minute = 60 seconds
∴ We multiply with 60 to 15 minutes to gets ‘seconds’
= 15 minutes × 60 = 900 seconds
∴ 15 minutes = 900 seconds
(Q3) How many seconds in 1.5 hours?
Solution:
We convert 1st 1.5 hour = 90 minutes
Now, 1 minute = 60 second
We multiply with 60 to 90 minutes to get seconds
60 × 90 minutes = 5400 seconds
(Q4) How many months in 8 3/4 years
Solution:
We know, 1 year = 12 months
Also, 3/4 year = 3/4 × 12 = 9 months
∴ 8 years + 3/4 years = (8×12) + 9 month
= 96 + 9 = 105 month
∴ 8 3/4 years = 105 month
(Q5) How many centimeters in 5.5m
Solution:
We know, 1 metre = 100 cm
∴ In 5.5, we multiply by 100
5.5×100 = 550 centimetre
(Q6) Convert 5km and 300m into metres.
Solution:
We know, 1 kilometre = 1000 metre
∴ 5km and 300m, we multiply by 1000 to 5
∴ 5km = 5×1000 m = 5000m
5000m + 300m = 5300 metre
(Q7) How many days in 23 weeks?
Solution:
We know, 1 week = 7 days
∴ In 23 weeks, we multiply by 7
∴ Days in 23 weeks = 23×7 = 161 days
(Q8) Add 3.5kg and 2200 grams.
Solution:
1st we convert 3.5kg in grams.
3.5 kg × 1000 = 3500 gm
∴ 3500 + 2200 gm = 4700 grams
Now, 4700 gm convert to kg.
We divide by 1000.
(Q9) Find sum of 5m 35cm and 225cm
Solution:
We know, 1m = 100cm
∴ 5m = 5×100 = 500cm
∴ 500 + 35 = 535 cm + 225 cm
= 760 cm
(Q10) How many grams are in 4/5 kg?
Solution:
We know, 1kg = 1000 gm
We have to find 4/5 kg, we multiply with 1000
4/5×1000 gm = 4×200 gm = 800 gm
(Q11) How many metres are in 6.893 km
Solution:
We know, 1km = 1000m
To find 6.893 km, we multiply by 1000
∴ 6.893 km × 1000 = 6893 grams
∴ 6.893 km = 6893 grams
(Q12) Convert 98325 mili litre into litres?
Solution:
We know, 1000 ml = 1 litre
∴ 9325 ml, we divide by 1000
9325/1000 = 9.325 litre
∴ 9325 ml = 9.325 litre
(Q13) Find sum of 8 litre 600ml and 900 ml?
Solution:
We know, 1litre = 1000 ml
We add
∴ 8 litre 600 ml + 900 ml = 9 litre 500 ml
(Q14) How many weeks in 12 years?
Solution:
We know,
In 1 year = 52 weeks
∴ In 12 years, we multiply it by 52
∴ 12×52 = 624 weeks
∴ In 12 years there are 624 weeks
(Q15) Add 3 1/2 kg + 205 gram + 15.208 kg
Solution:
We add 3 1/2 kg + 205gm + 15.208kg
∴ 3 1/2kg + 205gm + 15.208kg = 18.913kg
(Q16) What should be added in 370 metres to make 3km?
Solution:
Let, we add ‘x’ in 370m to get 3km
x + 370m = 3km
x = 3km – 370m
We know, 1km = 1000m = 3km = 3000m
x = 3000 – 370
x = 2630 metre
We add 2630 metre in 370m to get 3km
(Q17) What should be added in 75 grams to make it 2.5kg.
Solution:
We add ‘x’ in 753gm to make 2.5kg
x + 753gm = 2.5kg
x = 2.5 kg – 753gm
We know 1kg = 1000gm,
∴ 2.5k = 2500 gm
x = 2500 – 753
x = 1747 gm
We added 1747 gm in 753gm to make 2.5kg
(Q18) How many feets in 500 centimetre?
Solution:
We know, 1 feet = 30cm
In 500cm, w divide by 30
500/30 = 16.66 feet
500cm = 16.66 feet
(Q19) 475 ml is how much less than 3.5 l?
Solution:
We know, 1litre = 1000 ml
∴ 3.5 litre = 3500 m
∴ Subtraction 3500 ml – 475 ml
= 3025 ml or 3.025 litre
∴ 475 ml is 3025 ml less than 3.5 litre.
(Q20) 3.45m cloth is used to make dress. Then how many metre cloths required to make 5 dresses?
Solution:
For 1 dress 3.45m cloth is required.
For 5 dresses, we multiply 3.45 with 5
For 5 dresses = 3.45×5 = 17.25m cloth required.
(Q21) How many oranges are in 5 3/4 dozen?
Solution:
We know, 1 dozen = 12
In 5 3/4 dozen, we, multiply by 12
∴ 5 3/4 × 12 = 23/4 × 12 = 23 × 3 = 69 orange
In 5 3/4 dozen there are 69 oranges.
(Q22) H many ml in 6.325 litre?
Solution:
We know, 1 litre = 1000 m
∴ In 6.325 litre, we multiply by 1000
∴ 6.325 × 1000 = 6325ml
∴ 6.325 litre = 6325ml
(Q23) Find no. of days in 1st two months of a leap year?
Solution:
The 1st 2 months are January and February.
In leap year, February contains 29 days and in January there is 31 days.
∴ Total days = 31 + 29 = 60 days
(Q24) Water bucket capacity is 5 litre and 750ml find this in ml?
Solution:
We know, 1 litre = 1000ml
∴ 5 litre = we multiply with 1000
∴ 5 × 1000 = 5000ml + 750ml = 5750ml
∴ Water bucket capacity is 5750 ml
(Q25) How many feets are in 3 metre.
Solution:
We know,
1 metre = 100cm
∴ 3 metre = 300cm
Now, 1 feet = 30cm
∴ In 300cm, we divide by 30cm
∴ 300cm/30cm = 10 feet
∴ In 3 metres there are 10 feets.