Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 196 · 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. 1.7 + 8 =
2. 2.Best estimate of 86 × 36? (a) 36000 (b) 3600 (c) 360
3. 3.76 × 9 =
4. 4.Best estimate of 719 + 207? (a) 700 (b) 1100 (c) 900
5. 5.Best estimate of 833 + 230? (a) 1200 (b) 800 (c) 1000
6. 6.A train leaves at 4:35 and reaches the next city at 5:20. How many minutes is the journey?
7. 7.59 + 72 =
8. 8.Half of 120 =
9. 9.Best estimate of 18 × 28? (a) 60 (b) 600 (c) 6000
10. 10.88 × 7 =
11. 11.25 + 8 =
12. 12.10% of ₹240 =
13. 13.68 + 9 =
14. 14.Double 81 =
15. 15.82 − 15 =
16. 16.98 − 73 =
17. 17.59 − 49 =
18. 18.64 + 24 =
19. 19.19² =
20. 20.14 × 8 =
21. 21.You buy a storybook for ₹23 and a pen for ₹13. You pay with a ₹100 note. How much change do you get, in rupees?
22. 22.86 × 3 =
23. 23.34 + 89 =
24. 24.17 + 19 =
25. 25.A film starts at 2:50 and ends at 4:35. How many minutes long is the film?
26. 26.5 + ? = 10
27. 27.546 ÷ 7 =
28. 28.39 + 88 =
29. 29.58 + 8 =
30. 30.3 + ? = 10
31. 31.71 children stand in rows of 5. How many full rows can they make?
32. 32.26 × 4 =
33. 33.68 children stand in rows of 9. How many full rows can they make?
34. 34.42 × 8 =
35. 35.102 − 29 =
36. 36.1012 − 997 =
37. 37.66 + ? = 100
38. 38.511 − 497 =
39. 39.52 + 15 =
40. 40.10% of ₹470 =

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