Decimals Test

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Decimals Test - 1

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Weekly Quiz Competition

Question 1
1 / -0

How is 38.2 written in the place value table?

A
3 ones, 8 tens and 2 ones

B
3 tens, 8 ones and 2 ones

C
3 ones, 8 tens and 2 one-tenths

D
3 tens, 8 ones and 2 one-tenths

Solution

38.2 can be written in place value tables as 3 tens, 8 ones and 2 one-tenths.

Tens Ones . One-Tenths

3 8 . 2
Question 2
1 / -0

87 mm expressed in cm will be

A
87 cm

B
0.87 cm

C
8.7 cm

D
87.7 cm

Solution

We know that
1 centimeter (cm) = 10 millimeter (mm)
∴10 mm = 1 cm
or 1 mm = 1/10 cm
87 mm = 1/10 × 87 cm
= 87/10 cm
= 8.7 cm
Question 3
1 / -0

The length of a wire is 9 cm 5 mm. What will be its length in cm?

A
90.5 cm

B
0.95 cm

C
95 cm

D
9.5 cm

Solution

Given length of wire = 9 cm 5 mm
we know
1 cm = 10 mm
∴ 10 mm = 1 cm
1 mm = 1/10 cm
∴ 5 mm = 1/10×5 cm
= 5/10 cm
= 0.5 cm
∴ Length of wire in cm = 9 cm + 0.5 cm = 9.5 cm.
Therefore, 9 cm 5 mm in cm is 9.5 cm
Question 4
1 / -0

Which of the following values is the greatest?

1.09, 1.093, 1.009, 1.003

A
1.093

B
1.09

C
1.009

D
1.003

Solution

1.09 - One ones and nine hundredths
1.093 - One ones, nine hundredths and three thousandths
1.009 - One ones and nine thousandths
1.003 - One ones and three thousandths
∴ Out of 1.09, 1.093, 1.009 and 1.003, 1.093 is the greatest number.
Question 5
1 / -0

Which of the following numbers is smaller than 1.490?

A
1.494

B
1.940

C
1.049

D
1.491

Solution

Given number = 1.490 = One ones, four-tenths and nine hundredths

The number smaller than 1.490 is 1.049.

1.049 - One ones, 4 hundredths and 9 thousandths
Question 6
1 / -0

Which of the following statements is false?

A
0.05 < 0.5

B
1.23 > 1.2

C
0.3 < 0.4

D
0.07 < 0.02

Solution

(i) 0.05 < 0.5 (True)
In this case 0.5 has 5 at tenths place.
0.05 has 5 at hundredths place
so decimal with tenths place as 5 is bigger
∴0.05 < 0.5

(ii) 1.23 > 1.2 (True)
In this L.H.S. is 1.23
2 is at tenths place and 3 is at hundredths place.
R.H.S. is 1.2
2 is at tenths place and 0 is at hundredths place.
∴ 1.23 > 1.2
(iii) 0.3 < 0.4 (True)
L.H.S is 0.3 and 3 is at tenths place
R.H.S is 0.4 and 4 is at tenths place.
∴ 0.3 < 0.4

(iv) 0.07 < 0.02 is (False)
L.H.S is 0.07 and 7 is at hundredths place
R.H.S is 0.02 and 2 is at hundredths place
we know 7>2
∴0.07 > 0.02
But given 0.07 < 0.02.
∴ it is false
Question 7
1 / -0

Which of the following decimals is bigger than 33.333?

A
33.033

B
33.303

C
33.334

D
33.332

Solution

33.333 is given number

3 tens 3 ones 3 tenths 3 hundredths 3 thousandths

33.334 is greater than 33.333

as 4 > 3 and 4 is at thousandth place.

∴33.334 > 33.333
Question 8
1 / -0

Imran has apples, grapes and oranges weighing 500 g, 250 g and 700 g respectively. What is the total weight of these fruits?

A
14.50 kg

B
145.0 kg

C
0.1450 kg

D
1.450 kg

Solution

Weight of apples = 500 g
Weight of grapes = 250 g
Weight of oranges = 700 g
Total weight = 500 g + 250 g + 700 g = 1450 g
1 kg = 1000 g
1 g = 1/1000 kg
1450 g = 1450/1000 kg = 1.450 kg
Question 9
1 / -0

Which of the following expresses 5 kg 9 g as kg using decimals?

A
5.900 kg

B
5.009 kg

C
50.09 kg

D
500.9 kg

Solution

1 kg = 1000 g
1 g = 1/1000 kg
5 kg 9 g = 5009 g = 5009 / 1000 kg = 5.009 kg

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Tens	Ones	.	One-Tenths
3	8	.	2

Decimals Test - 1

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Decimals Test - 1

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Question 1

3 ones, 8 tens and 2 ones

3 tens, 8 ones and 2 ones

3 ones, 8 tens and 2 one-tenths

3 tens, 8 ones and 2 one-tenths

Solution

Question 2

87 cm

0.87 cm

8.7 cm

87.7 cm

Solution

Question 3

90.5 cm

0.95 cm

95 cm

9.5 cm

Solution

Question 4

1.093

1.09

1.009

1.003

Solution

Question 5

1.494

1.940

1.049

1.491

Solution

Question 6

0.05 < 0.5

1.23 > 1.2

0.3 < 0.4

0.07 < 0.02

Solution

Question 7

33.033

33.303

33.334

33.332

Solution

Question 8

14.50 kg

145.0 kg

0.1450 kg

1.450 kg

Solution

Question 9

5.900 kg

5.009 kg

50.09 kg

500.9 kg

Solution

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