Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 11 · 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. 1.37 + ? = 100
2. 2.Best estimate of 66 × 94? (a) 6300 (b) 63000 (c) 630
3. 3.17² =
4. 4.33 × 8 =
5. 5.31 × 6 =
6. 6.70 − 48 =
7. 7.5 + ? = 10
8. 8.38 × 8 =
9. 9.21² =
10. 10.A train leaves at 4:15 and reaches the next city at 5:40. How many minutes is the journey?
11. 11.Best estimate of 351 + 695? (a) 1100 (b) 900 (c) 1300
12. 12.Best estimate of 505 + 770? (a) 1500 (b) 1300 (c) 1100
13. 13.Half of 164 =
14. 14.99 × 4 =
15. 15.82 + 31 =
16. 16.66 − 24 =
17. 17.88 × 6 =
18. 18.55 × 9 =
19. 19.58 + 4 =
20. 20.5% of ₹340 =
21. 21.Double 53 =
22. 22.10% of ₹690 =
23. 23.2 + ? = 10
24. 24.8 + 5 =
25. 25.20 + 21 =
26. 26.12 − 9 =
27. 27.37 × 6 =
28. 28.50% of ₹630 =
29. 29.32 + ? = 100
30. 30.What is the remainder when 84 is divided by 8?
31. 31.88 + 32 =
32. 32.96 − 62 =
33. 33.12² =
34. 34.256 ÷ 8 =
35. 35.A cricket match starts at 1:25 and the first innings ends at 2:55. How many minutes did the innings last?
36. 36.Best estimate of 46 × 57? (a) 3000 (b) 30000 (c) 300
37. 37.Best estimate of 797 + 602? (a) 1200 (b) 1400 (c) 1600
38. 38.7 + ? = 10
39. 39.58 + 65 =
40. 40.5% of ₹720 =

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