Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 140 · 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. 1.77 − 27 =
2. 2.506 − 486 =
3. 3.81 − 69 =
4. 4.416 ÷ 8 =
5. 5.50% of ₹540 =
6. 6.59 + 7 =
7. 7.27 + 28 =
8. 8.25% of ₹210 =
9. 9.A cricket match starts at 7:50 and the first innings ends at 9:55. How many minutes did the innings last?
10. 10.15 + 17 =
11. 11.144 ÷ 8 =
12. 12.Double 59 =
13. 13.133 laddoos are packed in boxes of 9. How many laddoos are left over?
14. 14.Double 81 =
15. 15.You start your homework at 4:30 and finish at 6:15. How many minutes did you work?
16. 16.You buy a notebook for ₹36 and a pen for ₹39. You pay with a ₹100 note. How much change do you get, in rupees?
17. 17.434 ÷ 7 =
18. 18.78 − 9 =
19. 19.A cricket match starts at 3:40 and the first innings ends at 6:30. How many minutes did the innings last?
20. 20.57 + 24 =
21. 21.68 + 5 =
22. 22.29 + 6 =
23. 23.136 ÷ 8 =
24. 24.53 + 71 =
25. 25.A film starts at 7:50 and ends at 10:25. How many minutes long is the film?
26. 26.50% of ₹750 =
27. 27.Best estimate of 142 + 673? (a) 600 (b) 800 (c) 1000
28. 28.5% of ₹520 =
29. 29.56 − 42 =
30. 30.Half of 80 =
31. 31.25% of ₹190 =
32. 32.Best estimate of 54 × 26? (a) 150 (b) 1500 (c) 15000
33. 33.18² =
34. 34.10% of ₹780 =
35. 35.27 + 9 =
36. 36.What is the remainder when 32 is divided by 6?
37. 37.30 × 4 =
38. 38.22² =
39. 39.11 + 13 =
40. 40.41 × 5 =

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