Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 499 · 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. 1.26² =
2. 2.Half of 144 =
3. 3.1004 − 976 =
4. 4.125 children stand in rows of 9. How many full rows can they make?
5. 5.What is the remainder when 75 is divided by 8?
6. 6.53 − 31 =
7. 7.77 + 8 =
8. 8.32 × 4 =
9. 9.Best estimate of 38 × 33? (a) 12000 (b) 120 (c) 1200
10. 10.Best estimate of 577 + 266? (a) 700 (b) 1100 (c) 900
11. 11.79 − 67 =
12. 12.23 × 6 =
13. 13.17 × 8 =
14. 14.43 + 38 =
15. 15.228 ÷ 4 =
16. 16.Best estimate of 86 × 41? (a) 36000 (b) 360 (c) 3600
17. 17.17 + 29 =
18. 18.28 + 30 =
19. 19.62 + ? = 100
20. 20.51 − 9 =
21. 21.14 + 15 =
22. 22.21 × 4 =
23. 23.370 − 99 =
24. 24.25% of ₹540 =
25. 25.17² =
26. 26.204 ÷ 6 =
27. 27.10% of ₹840 =
28. 28.What is the remainder when 37 is divided by 4?
29. 29.You start your homework at 3:05 and finish at 5:35. How many minutes did you work?
30. 30.Best estimate of 92 × 38? (a) 360 (b) 36000 (c) 3600
31. 31.You buy a notebook for ₹170 and pay with a ₹500 note. How much change do you get, in rupees?
32. 32.66 × 7 =
33. 33.72 ÷ 4 =
34. 34.77 + 7 =
35. 35.85 laddoos are packed in boxes of 6. How many laddoos are left over?
36. 36.88 + ? = 100
37. 37.A film starts at 8:20 and ends at 10:10. How many minutes long is the film?
38. 38.40 laddoos are packed in boxes of 9. How many laddoos are left over?
39. 39.You start your homework at 8:30 and finish at 10:20. How many minutes did you work?
40. 40.Half of 120 =

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