Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 473 · 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. 1.85 + 8 =
2. 2.18 + 19 =
3. 3.5% of ₹760 =
4. 4.71 × 4 =
5. 5.64 ÷ 4 =
6. 6.56 children stand in rows of 9. How many full rows can they make?
7. 7.19² =
8. 8.536 − 99 =
9. 9.75 + 7 =
10. 10.46 + 8 =
11. 11.50% of ₹360 =
12. 12.15 × 8 =
13. 13.13 + 15 =
14. 14.77 + 61 =
15. 15.A cricket match starts at 7:00 and the first innings ends at 8:50. How many minutes did the innings last?
16. 16.You buy a notebook for ₹37 and pay with a ₹100 note. How much change do you get, in rupees?
17. 17.Double 91 =
18. 18.8 + 7 =
19. 19.Half of 180 =
20. 20.35 + 85 =
21. 21.80 + ? = 100
22. 22.54 − 9 =
23. 23.5% of ₹240 =
24. 24.46 × 4 =
25. 25.378 + 99 =
26. 26.15² =
27. 27.Half of 56 =
28. 28.27² =
29. 29.50% of ₹700 =
30. 30.837 ÷ 9 =
31. 31.120 ÷ 8 =
32. 32.31 × 8 =
33. 33.56 × 8 =
34. 34.You buy a notebook for ₹435 and pay with a ₹500 note. How much change do you get, in rupees?
35. 35.A film starts at 2:55 and ends at 5:05. How many minutes long is the film?
36. 36.17 + 5 =
37. 37.Best estimate of 846 + 426? (a) 1000 (b) 1400 (c) 1200
38. 38.Best estimate of 93 × 24? (a) 180 (b) 1800 (c) 18000
39. 39.31 + ? = 100
40. 40.82 − 67 =

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