Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 520 · 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. 1.18 + 17 =
2. 2.Half of 52 =
3. 3.12 × 4 =
4. 4.Double 98 =
5. 5.13² =
6. 6.25 + 8 =
7. 7.27 + 28 =
8. 8.31 × 7 =
9. 9.28² =
10. 10.A film starts at 5:45 and ends at 6:25. How many minutes long is the film?
11. 11.17² =
12. 12.16² =
13. 13.82 + ? = 100
14. 14.85 − 58 =
15. 15.You buy a cricket ball for ₹81 and pay with a ₹100 note. How much change do you get, in rupees?
16. 16.52 − 22 =
17. 17.4 + ? = 10
18. 18.17 + ? = 100
19. 19.27 + 29 =
20. 20.6 + ? = 10
21. 21.98 ÷ 7 =
22. 22.12 + 11 =
23. 23.76 + 9 =
24. 24.What is the remainder when 53 is divided by 4?
25. 25.94 − 35 =
26. 26.86 + 71 =
27. 27.You buy a water bottle for ₹293 and pay with a ₹500 note. How much change do you get, in rupees?
28. 28.25 + 7 =
29. 29.18 + 19 =
30. 30.6 + 5 =
31. 31.23 + 25 =
32. 32.469 ÷ 7 =
33. 33.104 ÷ 4 =
34. 34.You buy a storybook for ₹263 and pay with a ₹500 note. How much change do you get, in rupees?
35. 35.Best estimate of 60 × 67? (a) 420 (b) 42000 (c) 4200
36. 36.Best estimate of 66 × 42? (a) 280 (b) 28000 (c) 2800
37. 37.61 × 4 =
38. 38.208 + 99 =
39. 39.10% of ₹40 =
40. 40.10% of ₹840 =

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