Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 304 · 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. 1.240 ÷ 4 =
2. 2.24 + 25 =
3. 3.1 + ? = 10
4. 4.814 − 99 =
5. 5.70 + 25 =
6. 6.2 + ? = 10
7. 7.18 + 7 =
8. 8.59 + 79 =
9. 9.305 − 295 =
10. 10.29 × 5 =
11. 11.39 × 4 =
12. 12.25² =
13. 13.39 × 8 =
14. 14.34 + 59 =
15. 15.49 + 4 =
16. 16.60 ÷ 4 =
17. 17.10 + 12 =
18. 18.You buy a bag of mangoes for ₹424 and pay with a ₹500 note. How much change do you get, in rupees?
19. 19.58 − 9 =
20. 20.10% of ₹50 =
21. 21.21² =
22. 22.13² =
23. 23.86 + 9 =
24. 24.You buy a notebook for ₹64 and pay with a ₹100 note. How much change do you get, in rupees?
25. 25.17² =
26. 26.Best estimate of 32 × 91? (a) 2700 (b) 27000 (c) 270
27. 27.1014 − 987 =
28. 28.133 children stand in rows of 9. How many full rows can they make?
29. 29.11² =
30. 30.A cricket match starts at 2:45 and the first innings ends at 4:50. How many minutes did the innings last?
31. 31.48 + 6 =
32. 32.17 × 8 =
33. 33.A film starts at 1:45 and ends at 2:20. How many minutes long is the film?
34. 34.8 + ? = 10
35. 35.Best estimate of 495 + 234? (a) 900 (b) 500 (c) 700
36. 36.25 + 74 =
37. 37.1017 − 977 =
38. 38.24 + 89 =
39. 39.Best estimate of 26 × 78? (a) 24000 (b) 2400 (c) 240
40. 40.224 ÷ 4 =

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