# Lesson 3 - Decimal Quiz

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Quizzes Created: 1 | Total Attempts: 168
Questions: 10 | Attempts: 168  Settings  Rounding to decimal places10 Multiple Choice Questions

• 1.

### Round to 1 decimal place0.33 + 0.23

• A.

0.6

• B.

1.5

• C.

2.33

• D.

1.45

A. 0.6
Explanation
The given question asks to round the sum of 0.33 and 0.23 to 1 decimal place. Adding 0.33 and 0.23 gives a sum of 0.56. When rounding to 1 decimal place, we look at the digit in the second decimal place, which is 6. Since 6 is greater than or equal to 5, we round up the first decimal place, resulting in the answer of 0.6.

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• 2.

### Calculate to 1 decimal place0.49 + 0.29995

• A.

0.6

• B.

0.8

• C.

0.89

• D.

3.44

B. 0.8
Explanation
The correct answer is 0.8 because when we add 0.49 and 0.29995, we get a sum of 0.78995. Rounding this to one decimal place gives us 0.8.

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• 3.

### Calculate to 2 decimal places1.22222 + 1.333333

• A.

2.55

• B.

2.22

• C.

3.22

• D.

1.23

A. 2.55
Explanation
The given question asks to calculate the sum of 1.22222 and 1.333333 to 2 decimal places. When we add these two numbers, we get 2.555553. However, since we need to round the answer to 2 decimal places, we round it to 2.56. Therefore, the correct answer is 2.56.

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• 4.

### Calculate to 2 decimal places2.11432 + 2.220124

• A.

2.22

• B.

4.33

• C.

3.22

• D.

2.45

B. 4.33
Explanation
The correct answer is 4.33 because when we add 2.11432 and 2.220124 together and round to two decimal places, we get 4.33.

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• 5.

### Calculate to 2 decimal places2.89 + 0.10

• A.

0.89

• B.

3.22

• C.

2.99

• D.

5.1

C. 2.99
Explanation
When we add 2.89 and 0.10, we get a sum of 2.99.

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• 6.

### Calculate to 3 decimal places 5.44678

• A.

5.447

• B.

5.55

• C.

5.467

• D.

5.446

A. 5.447
Explanation
The given question asks to calculate 5.44678 to 3 decimal places. To do this, we look at the fourth decimal place, which is 6. Since 6 is greater than or equal to 5, we round up the third decimal place, which is 4, to 5. Therefore, the correct answer is 5.447.

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• 7.

### Which number correctly shows 98.9995 to 2 dp?

• A.

99.00

• B.

98.99

• C.

98.999

• D.

98.100

A. 99.00
Explanation
The number 98.9995 rounded to 2 decimal places is 99.00. This is because when rounding to 2 decimal places, we look at the third decimal place. If it is 5 or greater, we round up the second decimal place. In this case, the third decimal place is 9, so we round up the second decimal place from 9 to 0, resulting in 99.00.

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• 8.

### Which correctly shows 32.459 to 1 dp?

• A.

32.5

• B.

32.46

• C.

32.45

• D.

32.459

A. 32.5
Explanation
The correct answer is 32.5 because rounding 32.459 to 1 decimal place means that we only consider the first decimal digit after the decimal point. Since the digit 5 is greater than or equal to 5, we round up the previous digit, which is 2, to 3. Therefore, the number becomes 32.5.

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• 9.

### Which numbers shows 8.991253 to 4 dp?

• A.

8.9913

• B.

8.9912

• C.

8.9915

• D.

8.9910

A. 8.9913
Explanation
The question asks for the number that represents 8.991253 to 4 decimal places. To round to 4 decimal places, we look at the fifth decimal place (3 in this case). If the fifth decimal place is 5 or greater, we round up the fourth decimal place. Since the fifth decimal place is 3, which is less than 5, we do not round up. Therefore, the correct answer is 8.9913.

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• 10.

### Which number correctly shows Pi expressed to 4 dp?

• A.

3.1429

• B.

3.14

• C.

3.1

• D.

3.14285 Back to top