Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 394 · 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. 1.5 + 7 =
2. 2.75 + 7 =
3. 3.80 + ? = 100
4. 4.You buy a water bottle for ₹32 and pay with a ₹100 note. How much change do you get, in rupees?
5. 5.50% of ₹730 =
6. 6.70 + ? = 100
7. 7.Half of 86 =
8. 8.Half of 144 =
9. 9.518 − 483 =
10. 10.25 × 8 =
11. 11.You buy a notebook for ₹61 and pay with a ₹100 note. How much change do you get, in rupees?
12. 12.5 + 9 =
13. 13.Best estimate of 270 + 355? (a) 700 (b) 500 (c) 900
14. 14.25% of ₹610 =
15. 15.127 − 83 =
16. 16.Half of 188 =
17. 17.25 + 26 =
18. 18.104 ÷ 4 =
19. 19.69 − 44 =
20. 20.124 ÷ 4 =
21. 21.Double 46 =
22. 22.58 × 4 =
23. 23.648 ÷ 8 =
24. 24.A train leaves at 6:45 and reaches the next city at 9:15. How many minutes is the journey?
25. 25.880 − 99 =
26. 26.103 − 60 =
27. 27.79 × 8 =
28. 28.315 − 293 =
29. 29.27 + 9 =
30. 30.A film starts at 8:20 and ends at 9:30. How many minutes long is the film?
31. 31.56 × 4 =
32. 32.116 ÷ 4 =
33. 33.Double 23 =
34. 34.58 + 4 =
35. 35.83 − 29 =
36. 36.88 − 27 =
37. 37.5 + ? = 10
38. 38.204 ÷ 4 =
39. 39.You start your homework at 5:45 and finish at 6:55. How many minutes did you work?
40. 40.86 − 66 =

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