Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 261 · 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. 1.23 + 38 =
2. 2.45 + 61 =
3. 3.17 + 6 =
4. 4.Half of 74 =
5. 5.9 + 2 =
6. 6.97 − 29 =
7. 7.230 − 183 =
8. 8.502 − 485 =
9. 9.63 + 19 =
10. 10.22 + 23 =
11. 11.97 − 62 =
12. 12.You buy a notebook for ₹219 and pay with a ₹500 note. How much change do you get, in rupees?
13. 13.61 − 29 =
14. 14.31 × 4 =
15. 15.40 × 4 =
16. 16.Best estimate of 61 × 66? (a) 4200 (b) 42000 (c) 420
17. 17.84 + 26 =
18. 18.82 × 4 =
19. 19.6 + ? = 10
20. 20.328 − 296 =
21. 21.264 ÷ 3 =
22. 22.78 children stand in rows of 8. How many full rows can they make?
23. 23.Half of 36 =
24. 24.25% of ₹100 =
25. 25.336 ÷ 8 =
26. 26.56 ÷ 4 =
27. 27.44 + 9 =
28. 28.24 + 23 =
29. 29.67 + 5 =
30. 30.A film starts at 2:45 and ends at 3:30. How many minutes long is the film?
31. 31.68 × 3 =
32. 32.35 + 6 =
33. 33.45 children stand in rows of 4. How many full rows can they make?
34. 34.You buy a water bottle for ₹287 and pay with a ₹500 note. How much change do you get, in rupees?
35. 35.112 ÷ 8 =
36. 36.Double 64 =
37. 37.37 × 6 =
38. 38.Half of 118 =
39. 39.You start your homework at 2:05 and finish at 5:10. How many minutes did you work?
40. 40.17 × 8 =

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