Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 840 · 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. 1.24² =
2. 2.58 + 85 =
3. 3.Best estimate of 92 × 48? (a) 450 (b) 45000 (c) 4500
4. 4.51 ÷ 3 =
5. 5.30 + 89 =
6. 6.65 + 31 =
7. 7.36 × 8 =
8. 8.Half of 194 =
9. 9.22 + 19 =
10. 10.60 − 21 =
11. 11.79 + 29 =
12. 12.A cricket match starts at 4:30 and the first innings ends at 7:00. How many minutes did the innings last?
13. 13.35 × 4 =
14. 14.87 + ? = 100
15. 15.61 × 4 =
16. 16.A cricket match starts at 5:10 and the first innings ends at 7:35. How many minutes did the innings last?
17. 17.25 + ? = 100
18. 18.5% of ₹830 =
19. 19.5% of ₹570 =
20. 20.62 + 24 =
21. 21.55 + 8 =
22. 22.64 × 3 =
23. 23.87 × 4 =
24. 24.320 ÷ 8 =
25. 25.79 + 2 =
26. 26.A cricket match starts at 6:30 and the first innings ends at 7:50. How many minutes did the innings last?
27. 27.Best estimate of 16 × 90? (a) 18000 (b) 1800 (c) 180
28. 28.12 × 8 =
29. 29.A film starts at 8:25 and ends at 9:45. How many minutes long is the film?
30. 30.44 + 89 =
31. 31.11 + ? = 100
32. 32.25% of ₹540 =
33. 33.74 − 23 =
34. 34.53 × 4 =
35. 35.32 + 83 =
36. 36.Half of 168 =
37. 37.19 − 9 =
38. 38.1029 − 977 =
39. 39.15 + 16 =
40. 40.72 − 61 =

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