Lesson 3 - Decimal Quiz
Rounding to decimal places10 Multiple Choice Questions
Questions and Answers
- 1.
Round to 1 decimal place0.33 + 0.23
- A.
0.6
- B.
1.5
- C.
2.33
- D.
1.45
Correct Answer
A. 0.6Explanation
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.Rate this question:
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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
Correct Answer
B. 0.8Explanation
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.Rate this question:
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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
Correct Answer
A. 2.55Explanation
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.Rate this question:
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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
Correct Answer
B. 4.33Explanation
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.Rate this question:
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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
Correct Answer
C. 2.99Explanation
When we add 2.89 and 0.10, we get a sum of 2.99.Rate this question:
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- 6.
Calculate to 3 decimal places 5.44678
- A.
5.447
- B.
5.55
- C.
5.467
- D.
5.446
Correct Answer
A. 5.447Explanation
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.Rate this question:
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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
Correct Answer
A. 99.00Explanation
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.Rate this question:
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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
Correct Answer
A. 32.5Explanation
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.Rate this question:
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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
Correct Answer
A. 8.9913Explanation
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.Rate this question:
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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
Correct Answer
A. 3.1429Explanation
The number 3.1429 correctly shows Pi expressed to 4 decimal places. Pi is an irrational number with an infinite number of decimal places, but when rounded to 4 decimal places, it becomes 3.1429.Rate this question:
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Mar 20, 2023Quiz Edited by
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Mar 14, 2015Quiz Created by
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