Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 867 · 40 questions

How to do it in your head (Look first): A 9, 19 or 99 → round and adjust. Two close numbers → count up (or near doubles when adding). × or ÷ by 4 or 8 → double or halve; other sums → split into tens and ones.

1. 1.76 + 27 =
2. 2.79 + 6 =
3. 3.17 + 19 =
4. 4.33 + ? = 100
5. 5.What is the remainder when 30 is divided by 4?
6. 6.28 + 30 =
7. 7.Best estimate of 120 + 664? (a) 600 (b) 1000 (c) 800
8. 8.302 + 99 =
9. 9.A film starts at 2:25 and ends at 4:25. How many minutes long is the film?
10. 10.90 − 56 =
11. 11.10% of ₹670 =
12. 12.Best estimate of 66 × 76? (a) 5600 (b) 56000 (c) 560
13. 13.172 ÷ 4 =
14. 14.What is the remainder when 118 is divided by 9?
15. 15.10 + 12 =
16. 16.216 − 191 =
17. 17.72 + ? = 100
18. 18.20 × 8 =
19. 19.75 ÷ 5 =
20. 20.30 × 8 =
21. 21.13 + 12 =
22. 22.1017 − 993 =
23. 23.58 + 9 =
24. 24.41 children stand in rows of 4. How many full rows can they make?
25. 25.48 − 9 =
26. 26.21² =
27. 27.31 × 3 =
28. 28.Best estimate of 246 + 819? (a) 1200 (b) 800 (c) 1000
29. 29.713 − 99 =
30. 30.497 ÷ 7 =
31. 31.You buy a storybook for ₹99 and pay with a ₹100 note. How much change do you get, in rupees?
32. 32.A train leaves at 4:40 and reaches the next city at 7:30. How many minutes is the journey?
33. 33.49 + 31 =
34. 34.You start your homework at 6:10 and finish at 8:40. How many minutes did you work?
35. 35.25% of ₹240 =
36. 36.27 × 8 =
37. 37.13² =
38. 38.34 × 8 =
39. 39.79 + 4 =
40. 40.12² =

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