Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 49 · 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. 1.56 + 6 =
2. 2.You buy a storybook for ₹86 and pay with a ₹100 note. How much change do you get, in rupees?
3. 3.58 − 37 =
4. 4.55 − 21 =
5. 5.27² =
6. 6.A film starts at 1:25 and ends at 3:15. How many minutes long is the film?
7. 7.Half of 152 =
8. 8.You buy a water bottle for ₹94 and pay with a ₹100 note. How much change do you get, in rupees?
9. 9.89 + 53 =
10. 10.27 + 9 =
11. 11.25 × 8 =
12. 12.86 × 6 =
13. 13.6 + ? = 10
14. 14.Double 19 =
15. 15.Best estimate of 838 + 539? (a) 1300 (b) 1500 (c) 1100
16. 16.43 + 67 =
17. 17.A cricket match starts at 6:00 and the first innings ends at 7:50. How many minutes did the innings last?
18. 18.104 − 89 =
19. 19.71 − 34 =
20. 20.25 + ? = 100
21. 21.You buy a pencil box for ₹41 and pay with a ₹100 note. How much change do you get, in rupees?
22. 22.Best estimate of 855 + 741? (a) 1800 (b) 1600 (c) 1400
23. 23.52 − 18 =
24. 24.Best estimate of 66 × 73? (a) 4900 (b) 49000 (c) 490
25. 25.87 − 74 =
26. 26.62 − 49 =
27. 27.46 + 88 =
28. 28.6 + 9 =
29. 29.74 − 31 =
30. 30.59 + 6 =
31. 31.38 × 3 =
32. 32.62 − 17 =
33. 33.13² =
34. 34.282 ÷ 6 =
35. 35.You start your homework at 6:45 and finish at 9:55. How many minutes did you work?
36. 36.25% of ₹820 =
37. 37.306 − 297 =
38. 38.14² =
39. 39.31 + ? = 100
40. 40.You buy a cricket ball for ₹479 and pay with a ₹500 note. How much change do you get, in rupees?

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