Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 411 · 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. 1.530 − 486 =
2. 2.72 + ? = 100
3. 3.You buy a kite for ₹132 and pay with a ₹500 note. How much change do you get, in rupees?
4. 4.14 × 8 =
5. 5.25% of ₹580 =
6. 6.220 ÷ 4 =
7. 7.52 + 89 =
8. 8.Best estimate of 82 × 59? (a) 4800 (b) 48000 (c) 480
9. 9.144 ÷ 8 =
10. 10.A film starts at 3:30 and ends at 5:30. How many minutes long is the film?
11. 11.108 ÷ 9 =
12. 12.35 + 8 =
13. 13.77 − 29 =
14. 14.9 + ? = 10
15. 15.80 + 45 =
16. 16.208 − 192 =
17. 17.129 ÷ 3 =
18. 18.18 + 20 =
19. 19.You start your homework at 4:05 and finish at 4:40. How many minutes did you work?
20. 20.41 × 3 =
21. 21.320 ÷ 8 =
22. 22.42 ÷ 3 =
23. 23.Best estimate of 43 × 69? (a) 2800 (b) 28000 (c) 280
24. 24.17 + 18 =
25. 25.Double 24 =
26. 26.200 ÷ 8 =
27. 27.10 + 12 =
28. 28.28 + 29 =
29. 29.You start your homework at 4:40 and finish at 7:10. How many minutes did you work?
30. 30.57 + ? = 100
31. 31.208 ÷ 8 =
32. 32.77 + ? = 100
33. 33.509 − 488 =
34. 34.Best estimate of 567 + 805? (a) 1200 (b) 1400 (c) 1600
35. 35.Best estimate of 76 × 32? (a) 240 (b) 24000 (c) 2400
36. 36.28² =
37. 37.Best estimate of 96 × 60? (a) 6000 (b) 60000 (c) 600
38. 38.Half of 106 =
39. 39.72 − 19 =
40. 40.126 − 92 =

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