Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 974 · 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. 1.25% of ₹650 =
2. 2.49 + 32 =
3. 3.Best estimate of 26 × 29? (a) 900 (b) 9000 (c) 90
4. 4.1022 − 994 =
5. 5.35 + 8 =
6. 6.364 ÷ 4 =
7. 7.25 + 6 =
8. 8.85 + ? = 100
9. 9.Best estimate of 673 + 752? (a) 1300 (b) 1700 (c) 1500
10. 10.Best estimate of 20 × 27? (a) 6000 (b) 60 (c) 600
11. 11.22 + 19 =
12. 12.You start your homework at 6:25 and finish at 7:05. How many minutes did you work?
13. 13.A film starts at 3:45 and ends at 6:45. How many minutes long is the film?
14. 14.83 − 72 =
15. 15.What is the remainder when 71 is divided by 6?
16. 16.85 − 69 =
17. 17.325 − 281 =
18. 18.330 − 278 =
19. 19.25% of ₹590 =
20. 20.5% of ₹870 =
21. 21.94 − 78 =
22. 22.A train leaves at 7:15 and reaches the next city at 8:50. How many minutes is the journey?
23. 23.Half of 158 =
24. 24.15 + ? = 100
25. 25.2 + ? = 10
26. 26.4 + ? = 10
27. 27.25% of ₹900 =
28. 28.66 + 31 =
29. 29.27² =
30. 30.23 × 8 =
31. 31.1 + ? = 10
32. 32.95 − 24 =
33. 33.You buy a notebook for ₹21 and pay with a ₹100 note. How much change do you get, in rupees?
34. 34.63 + 58 =
35. 35.56 + 17 =
36. 36.38 × 3 =
37. 37.16 + 8 =
38. 38.16 + 9 =
39. 39.21² =
40. 40.1014 − 995 =

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