Decimals mixed questions for Year 7,8 with notes and useful questions with sample answers.

1. Decimals

2. Decimals
1. In the number 3.1415
(a) what does the 1 mean?
(b) what does the 4 mean?
2. Write these numbers as decimals:
(a) one and a half
(b) one tenth
(c) seven tenths
(d) three hundredths
(e) two and five tenths

3. Decimals
1. In the number 72.345
(a) what does the 7 mean? (answer: 7 tens)
(b) what does the 3 mean?
(c) what does the 5 mean?
2. Write these numbers as decimals:
(a) one hundredth (answer: 0.01)
(b) one tenth
(c) one hundred
(d) three hundredths
(e) five thousandths
(f) seven tenths

4. Decimals
1. In the number 23.845
(a) how many tenths are there?
(b) how many hundredths are there?
(c) how many thousandths are there?
2. Write each of these as a number:
(a) one hundredth (b) seven hundredths
(c) six tenths (d) two tenths
(e) one tenth (f) three thousandths
0.07 0.1 0.01 0.2 0.003 0.6

5. Decimals
• Adding and subtracting decimals

6. Decimals
Adding decimals
1) 0.1 + 0.22 2) 0.5 + 0.36
3) 0.33 + 0.43 4) 0.452 + 0.2
5) 0.21 + 0.03 6) 0.218 + 2.1

7. Decimals
Adding decimals
1) 1.2 + 3.52 2) 0.2 + 1.36
3) 11.3 + 1.23 4) 12.452 + 1.23
5) 0.1 + 0.23 6) 11.8 + 1.3

8. Decimals
Subtracting decimals
1) 5.72 - 3.5 2) 3.4 - 1.36
3) 12.82 - 1.5 4) 6.452 - 1.23
5) 0.6 - 0.23 6) 11.8 - 10.3

9. Decimals
Practice decimals adding and subtraction
1. 3.6 + 1.5
2. 5.14 + 2.61
3. 1.2 + 9.35
4. 6.21 – 4.2

10. Decimals
• Multiplying and dividing decimals

11. Decimals
Multiplying decimals
1) 1.2 x 3 2) 0.23 x 3
3) 11.3 x 4 4) 12.452 x 2
5) 6 x 0.23 6) 8 x 1.32

12. Decimals
Dividing decimals
1) 1.2 ÷ 3 2) 0.48 ÷ 3
3) 13.2 ÷ 4 4) 12.452 ÷ 2
5) 14 ÷ 4 6) 10.4 ÷ 4

13. Decimals
Practice decimals multiplication and division
1. 2 x 3.6
2. 1.345 x 3
3. 12 ÷ 5
4. 1.44 ÷ 4

14. Decimals
• Rounding decimals to a specified number
of decimal places

15. Decimals
Rounding decimals
1) Round 1.32 to 1 d.p.
2) Round 1.38 to 1 d.p.
3) Round 12.354 to 1 d.p.
4) Round 1111.353 to 1 d.p.
5) Round 100.35 to 1 d.p.
6) Round 4.3235 to 1 d.p.

16. Decimals
Rounding decimals
1) Round 1.322 to 2 d.p.
2) Round 1.325 to 2 d.p.
3) Round 12.354 to 2 d.p.
4) Round 131.353 to 2 d.p.
5) Round 340.335 to 2 d.p.
6) Round 4.3235 to 2 d.p.

17. Decimals
Practice decimals rounding
1. Round 1.27 to one decimal place
2. Round 5.763 to one decimal place
3. Round 2.3461 to two decimal places
4. Round 3.141592 to two decimal places

18. Decimals
Using your calculator
1) Find 100 ÷ 7, and round your answer to 1 d.p.
2) Find 20 ÷ 3, and round your answer to 2 d.p.
3) Find 0.123 x 12, and round your answer to 1 d.p.
4) Find 0.123 x 1.346, and round your answer to 2 d.p.

19. Mixed Questions
1. 0.1 + 0.23
2. Three hundredths plus two tenths
3. Round the number 6.23 to one decimal place
4. Round the number 4.852 to two decimal places
5. Find the approximate answer to: 9.74 x 40.34

20. Decimals
1. Find £0.98 + £1.23 + £0.11
2. (a) Find 5 – 3.36
(b) Find 1.234 x 4
3. (a) Round your answer to 2(a) to 1 decimal place
(b) Round your answer to 2(b) to 2 decimal places

21. Mixed Questions
1. 0.12 + 1.23
2. 0.4 x 3
3. 1.55 ÷ 5
4. Round the number 1.23 to one decimal place
5. Round the number 4.763 to two decimal places

22. Mixed Questions
1. Find £0.98 + £1.23 + £0.11
2. (a) Find 5 – 3.36
(b) Find 1.234 x 4
3. (a) Round your answer to 2(a) to 1 decimal place
(b) Round your answer to 2(b) to 2 decimal places