# Free Measurements 02 Practice Test - 4th Grade

To convert length given in metres (m) into centimetres (cm) we:

A.

divide by 100

B.

multiply  by 100

C.

divide by 1000

D.

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.

300 g + ______ g = 1 kg

A.

600

B.

700

C.

800

D.

1000

#### SOLUTION

Solution : B

We know that 1 kg = 1000 g

Therefore, 300 g + ______ = 1000 g

= 1000 g - 300 g

= 700 g

If

A.

100 mL

B.

200 mL

C.

300 mL

D.

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 glasses

Capacity of 1 glass = 2000 ÷ 5
= 400 mL

Select the option in which the measurement conversion is correct.

A.

1 m = 100 mm

B.

1 km = 100 m

C.

1 m = 100 cm

D.

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.

Long distances between two places are measured in _____.

A.

Millimetre

B.

Milligram

C.

Kilometre

D.

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.

By how much is the length of string A more than string B?

A.

10 mm

B.

20 mm

C.

30 mm

D.

40 mm

#### SOLUTION

Solution : A

String A is starting from 1 cm.
Subtract 1 cm from 9 cm.
Lenght of string A
=9 cm1 cm=8 cm

String B is starting from 3 cm.
Subtract 3 cm from 10 cm.
Length of string B
=10 cm3 cm=7 cm

Thus, the difference in length of  String A and String B
=8 cm7 cm=1 cm=10 mm

The length of string A is more than string B by 10 mm.

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?

A.

4

B.

8

C.

16

D.

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.

From the given figure, find the weight of the mangoes.

A.

2 kg

B.

2.4 kg

C.

2.8 kg

D.

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

Find the quantity of water needed to be mixed with 3800 mL of lime juice to make 6 litres of lemonade.

A.

2200 mL

B.

120 mL

C.

2000 mL

D.

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.

4 kg - 400 g = ____

A.

2400 g

B.

2600 g

C.

3600 g

D.

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