Free Measurements 02 Practice Test - 4th Grade
Question 1
To convert length given in metres (m) into centimetres (cm) we:
divide by 100
multiply by 100
divide by 1000
multiply by 1000
SOLUTION
Solution : B
When we convert a larger unit (m) to a smaller unit (cm), we multiply by the conversion factor.
Therefore, to convert length given in metres (m) to centimetres (cm) we have to multiply by 100.
Question 2
300 g +
600
700
800
1000
SOLUTION
Solution : B
We know that 1 kg = 1000 g
Therefore, 300 g +
___ ___ = 1000 g= 1000 g - 300 g
= 700 g
Question 3
If
100 mL
200 mL
300 mL
400 mL
SOLUTION
Solution : D
Capacity of 5 glasses = 2 Litres
When we convert a larger unit (L) to a smaller unit (mL) we multiply.
1 Litre = 1000 mL
Hence 2 Litres = 2 × 1000 = 2000 mL
Capacity of 1 glass = Total capacity ÷ No. of glassesCapacity of 1 glass = 2000 ÷ 5
= 400 mL
Question 4
Select the option in which the measurement conversion is correct.
1 m = 100 mm
1 km = 100 m
1 m = 100 cm
1 cm = 100 mm
SOLUTION
Solution : C
We know that,
1 m = 100 cm
1 km = 1000 m
1 cm = 10 mm
∴ In the 4 given options, 1 m = 100 cm is correct.
Question 5
Long distances between two places are measured in _____.
Millimetre
Milligram
Kilometre
Kilogram
SOLUTION
Solution : C
Kilogram (kg) and milligram (mg) are the units of mass.
Millimetre (mm) is the unit used to measure the length of very small objects like the length of a pin, seed etc.
Kilometre (km) is the unit used to measure long distances between two places.
Question 6
By how much is the length of string A more than string B?
10 mm
20 mm
30 mm
40 mm
SOLUTION
Solution : A
String `A` is starting from 1 cm.
∴ Subtract 1 cm from 9 cm.
Lenght of string A
=9 cm−1 cm=8 cm
String `B` is starting from 3 cm.
∴ Subtract 3 cm from 10 cm.
Length of string B
=10 cm−3 cm=7 cm
Thus, the difference in length of String `A` and String `B`
=8 cm−7 cm=1 cm=10 mm
∴ The length of string A is more than string B by 10 mm.
Question 7
Tina went to a shop to buy 3 litres of orange juice for a party. The store sold orange juice only in 250 mL cartons. How many 250 mL cartons will Tina need to buy?
4
8
16
12
SOLUTION
Solution : D
1 L=1000 mL
⇒3 L=3×1000 mL
=3000 mL
Therefore, the quantity of juice Tina wants to buy equals 3000 mL.
Since the store sells only 250 mL cartons, the number of such cartons that Tina has to buy is given by 3000250=12.
Question 8
From the given figure, find the weight of the mangoes.
2 kg
2.4 kg
2.8 kg
3 kg
SOLUTION
Solution : B
Weight of mangoes + 100 g + 500 g = 1 kg + 2 kg
⇒Required weight + 600 g =3 kg
⇒Required weight=3 kg - 600 g
To move ahead, we need to convert the units. Since we need the final answer in kilograms, let us convert 600 g to kilograms.
1 kg=1000 g
⇒ 600 g=6001000 kg
=0.6 kg
∴ Weight of mangoes =3 kg - 0.6 kg
=2.4 kg
Question 9
Find the quantity of water needed to be mixed with 3800 mL of lime juice to make 6 litres of lemonade.
2200 mL
120 mL
2000 mL
1200 mL
SOLUTION
Solution : A
1 L=1000 mL
⇒6 L=6×1000 mL=6000 mL
Thus, the total quantity of lemonade to be prepared is 6000 mL. The quantity of lime juice that we have is 3800 mL.⇒ Quantity of water required to make the lemonade is given by
6000 mL - 3800 mL = 2200 mL.
Question 10
4 kg - 400 g = ____
2400 g
2600 g
3600 g
3400 g
SOLUTION
Solution : C
Both the quantities 4 kg and 400 g have different units.
So let's convert 4 kg to grams.
We know that 1 kg = 1000 g
(To convert a larger unit (kg) to a smaller unit (g) we multiply by the conversion factor.)Therefore, 4 kg = 4 × 1000 g
Now, 4000 g - 400 g = 3600 g