Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 652 · 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. 1.14² =
2. 2.89 + 7 =
3. 3.31 + 14 =
4. 4.Best estimate of 96 × 93? (a) 90000 (b) 900 (c) 9000
5. 5.40 + 52 =
6. 6.164 ÷ 4 =
7. 7.87 ÷ 3 =
8. 8.Best estimate of 208 + 560? (a) 800 (b) 1000 (c) 600
9. 9.28² =
10. 10.66 + 8 =
11. 11.63 + 19 =
12. 12.52 + 19 =
13. 13.10% of ₹650 =
14. 14.You buy a cricket ball for ₹80 and pay with a ₹100 note. How much change do you get, in rupees?
15. 15.208 ÷ 8 =
16. 16.53 + ? = 100
17. 17.15 + 6 =
18. 18.A film starts at 3:25 and ends at 4:05. How many minutes long is the film?
19. 19.46 × 4 =
20. 20.22 + 62 =
21. 21.104 ÷ 4 =
22. 22.You start your homework at 2:25 and finish at 4:25. How many minutes did you work?
23. 23.A cricket match starts at 2:05 and the first innings ends at 4:05. How many minutes did the innings last?
24. 24.18² =
25. 25.23 + 25 =
26. 26.39 × 4 =
27. 27.327 − 287 =
28. 28.516 − 477 =
29. 29.69 + 77 =
30. 30.529 − 486 =
31. 31.60 + 13 =
32. 32.86 × 9 =
33. 33.22 + 64 =
34. 34.You buy a pencil box for ₹71 and pay with a ₹100 note. How much change do you get, in rupees?
35. 35.78 − 43 =
36. 36.61 × 4 =
37. 37.308 − 297 =
38. 38.95 − 42 =
39. 39.86 − 64 =
40. 40.323 − 292 =

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