Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 500 · 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.Best estimate of 87 × 56? (a) 5400 (b) 54000 (c) 540
2. 2.45 × 4 =
3. 3.65 − 43 =
4. 4.86 − 39 =
5. 5.10 + 9 =
6. 6.21² =
7. 7.36 × 6 =
8. 8.63 × 6 =
9. 9.19 + 9 =
10. 10.16 × 5 =
11. 11.60 − 31 =
12. 12.A train leaves at 3:55 and reaches the next city at 5:35. How many minutes is the journey?
13. 13.98 − 70 =
14. 14.Best estimate of 668 + 480? (a) 1200 (b) 1000 (c) 1400
15. 15.30 + 9 =
16. 16.75 + 8 =
17. 17.Half of 80 =
18. 18.35 + 9 =
19. 19.52 + ? = 100
20. 20.28 × 4 =
21. 21.64 × 4 =
22. 22.Best estimate of 542 + 149? (a) 800 (b) 600 (c) 400
23. 23.Best estimate of 184 + 551? (a) 1000 (b) 600 (c) 800
24. 24.201 − 198 =
25. 25.1 + ? = 10
26. 26.71 − 21 =
27. 27.9 + 10 =
28. 28.A film starts at 8:45 and ends at 11:50. How many minutes long is the film?
29. 29.13 + 12 =
30. 30.76 + 8 =
31. 31.A film starts at 5:40 and ends at 7:15. How many minutes long is the film?
32. 32.97 − 69 =
33. 33.18 × 7 =
34. 34.You buy a kite for ₹16 and a pen for ₹25. You pay with a ₹100 note. How much change do you get, in rupees?
35. 35.164 ÷ 4 =
36. 36.5 + 9 =
37. 37.50% of ₹260 =
38. 38.Double 84 =
39. 39.48 × 3 =
40. 40.29 × 8 =

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