Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 368 · 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. 1.18² =
2. 2.107 − 69 =
3. 3.What is the remainder when 142 is divided by 9?
4. 4.3 + ? = 10
5. 5.43 + 62 =
6. 6.113 − 83 =
7. 7.112 ÷ 8 =
8. 8.What is the remainder when 65 is divided by 6?
9. 9.67 − 54 =
10. 10.66 − 35 =
11. 11.Best estimate of 398 + 146? (a) 500 (b) 300 (c) 700
12. 12.A train leaves at 3:20 and reaches the next city at 3:55. How many minutes is the journey?
13. 13.50% of ₹830 =
14. 14.5% of ₹730 =
15. 15.A cricket match starts at 3:05 and the first innings ends at 5:55. How many minutes did the innings last?
16. 16.87 + ? = 100
17. 17.Best estimate of 628 + 316? (a) 1100 (b) 900 (c) 700
18. 18.You buy a notebook for ₹181 and pay with a ₹500 note. How much change do you get, in rupees?
19. 19.39 + ? = 100
20. 20.65 + 9 =
21. 21.You start your homework at 7:15 and finish at 8:15. How many minutes did you work?
22. 22.78 + 77 =
23. 23.Double 48 =
24. 24.105 children stand in rows of 8. How many full rows can they make?
25. 25.2 + ? = 10
26. 26.27² =
27. 27.60 − 29 =
28. 28.You buy a storybook for ₹37 and pay with a ₹100 note. How much change do you get, in rupees?
29. 29.23 × 8 =
30. 30.A train leaves at 5:00 and reaches the next city at 7:05. How many minutes is the journey?
31. 31.16² =
32. 32.344 ÷ 8 =
33. 33.Double 81 =
34. 34.88 × 9 =
35. 35.525 ÷ 7 =
36. 36.1017 − 986 =
37. 37.349 + 99 =
38. 38.76 ÷ 4 =
39. 39.61 − 17 =
40. 40.57 ÷ 3 =

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