Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 753 · 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. 1.69 − 43 =
2. 2.57 + 33 =
3. 3.A film starts at 1:25 and ends at 1:50. How many minutes long is the film?
4. 4.41 × 4 =
5. 5.50% of ₹540 =
6. 6.24 + ? = 100
7. 7.165 + 99 =
8. 8.25 + 52 =
9. 9.192 ÷ 8 =
10. 10.1013 − 975 =
11. 11.26 + 25 =
12. 12.A cricket match starts at 2:20 and the first innings ends at 4:30. How many minutes did the innings last?
13. 13.6 + 7 =
14. 14.10% of ₹880 =
15. 15.321 − 276 =
16. 16.531 ÷ 9 =
17. 17.16² =
18. 18.50% of ₹480 =
19. 19.7 + 9 =
20. 20.A cricket match starts at 5:15 and the first innings ends at 6:35. How many minutes did the innings last?
21. 21.104 ÷ 8 =
22. 22.12 × 8 =
23. 23.Best estimate of 510 + 622? (a) 1100 (b) 1300 (c) 900
24. 24.53 + ? = 100
25. 25.25% of ₹350 =
26. 26.63 − 22 =
27. 27.Double 25 =
28. 28.Best estimate of 873 + 408? (a) 1500 (b) 1300 (c) 1100
29. 29.54 × 6 =
30. 30.Half of 160 =
31. 31.24² =
32. 32.328 ÷ 8 =
33. 33.Best estimate of 39 × 13? (a) 40 (b) 4000 (c) 400
34. 34.43 × 3 =
35. 35.Best estimate of 36 × 77? (a) 32000 (b) 3200 (c) 320
36. 36.Best estimate of 16 × 32? (a) 6000 (b) 60 (c) 600
37. 37.55 + 9 =
38. 38.87 − 29 =
39. 39.A film starts at 6:10 and ends at 9:30. How many minutes long is the film?
40. 40.52 laddoos are packed in boxes of 8. How many laddoos are left over?

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