Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 369 · 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. 1.67 + 8 =
2. 2.Half of 104 =
3. 3.462 ÷ 7 =
4. 4.12² =
5. 5.6 + ? = 10
6. 6.27² =
7. 7.124 − 93 =
8. 8.You start your homework at 3:00 and finish at 6:05. How many minutes did you work?
9. 9.322 − 295 =
10. 10.44 + 39 =
11. 11.50% of ₹550 =
12. 12.16 + ? = 100
13. 13.36 − 29 =
14. 14.Double 97 =
15. 15.Best estimate of 437 + 470? (a) 1100 (b) 900 (c) 700
16. 16.70 − 9 =
17. 17.You start your homework at 2:55 and finish at 4:20. How many minutes did you work?
18. 18.50% of ₹650 =
19. 19.42 + 63 =
20. 20.25 + 6 =
21. 21.536 ÷ 8 =
22. 22.65 + 8 =
23. 23.595 ÷ 7 =
24. 24.You buy a cricket ball for ₹28 and a pen for ₹11. You pay with a ₹100 note. How much change do you get, in rupees?
25. 25.A film starts at 3:25 and ends at 5:55. How many minutes long is the film?
26. 26.70 − 29 =
27. 27.Double 22 =
28. 28.39 + 46 =
29. 29.19 children stand in rows of 3. How many full rows can they make?
30. 30.69 + ? = 100
31. 31.Half of 82 =
32. 32.63 − 34 =
33. 33.80 − 12 =
34. 34.6 + 8 =
35. 35.Best estimate of 16 × 34? (a) 6000 (b) 600 (c) 60
36. 36.41 × 4 =
37. 37.Double 25 =
38. 38.36 × 3 =
39. 39.10% of ₹240 =
40. 40.77 + 4 =

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