Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 538 · 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. 1.315 + 99 =
2. 2.42 − 9 =
3. 3.759 + 99 =
4. 4.57 × 9 =
5. 5.6 + ? = 10
6. 6.A film starts at 3:15 and ends at 5:55. How many minutes long is the film?
7. 7.200 ÷ 8 =
8. 8.60 − 31 =
9. 9.Best estimate of 848 + 421? (a) 1000 (b) 1200 (c) 1400
10. 10.210 − 198 =
11. 11.98 − 58 =
12. 12.1016 − 998 =
13. 13.50% of ₹890 =
14. 14.19 + 20 =
15. 15.8 + ? = 10
16. 16.92 ÷ 4 =
17. 17.66 × 9 =
18. 18.318 − 296 =
19. 19.2 + ? = 10
20. 20.62 + ? = 100
21. 21.58 − 44 =
22. 22.79 + 41 =
23. 23.312 − 288 =
24. 24.18² =
25. 25.Half of 36 =
26. 26.52 + 9 =
27. 27.13 × 4 =
28. 28.You buy a water bottle for ₹49 and pay with a ₹100 note. How much change do you get, in rupees?
29. 29.22 × 8 =
30. 30.You buy a cricket ball for ₹56 and pay with a ₹100 note. How much change do you get, in rupees?
31. 31.55 + 7 =
32. 32.64 ÷ 4 =
33. 33.60 − 46 =
34. 34.62 − 48 =
35. 35.87 + ? = 100
36. 36.You buy a cricket ball for ₹11 and a pen for ₹20. You pay with a ₹100 note. How much change do you get, in rupees?
37. 37.110 − 58 =
38. 38.23 × 8 =
39. 39.105 − 73 =
40. 40.9 + ? = 10

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