Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 78 · 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. 1.501 − 495 =
2. 2.50% of ₹200 =
3. 3.82 + ? = 100
4. 4.A train leaves at 6:15 and reaches the next city at 8:55. How many minutes is the journey?
5. 5.24² =
6. 6.50% of ₹430 =
7. 7.Double 19 =
8. 8.A train leaves at 2:10 and reaches the next city at 4:50. How many minutes is the journey?
9. 9.27² =
10. 10.55 laddoos are packed in boxes of 4. How many laddoos are left over?
11. 11.78 − 51 =
12. 12.115 laddoos are packed in boxes of 8. How many laddoos are left over?
13. 13.Double 35 =
14. 14.20 + 21 =
15. 15.60 × 4 =
16. 16.45 + 7 =
17. 17.73 + 77 =
18. 18.25 × 5 =
19. 19.31 children stand in rows of 4. How many full rows can they make?
20. 20.Best estimate of 54 × 38? (a) 200 (b) 2000 (c) 20000
21. 21.36 × 5 =
22. 22.71 × 4 =
23. 23.73 − 40 =
24. 24.47 + 9 =
25. 25.176 ÷ 4 =
26. 26.34 + 29 =
27. 27.14² =
28. 28.10% of ₹280 =
29. 29.384 ÷ 6 =
30. 30.A film starts at 8:25 and ends at 9:35. How many minutes long is the film?
31. 31.You buy a storybook for ₹23 and pay with a ₹100 note. How much change do you get, in rupees?
32. 32.Best estimate of 687 + 645? (a) 1300 (b) 1500 (c) 1100
33. 33.15² =
34. 34.Best estimate of 857 + 145? (a) 1200 (b) 1000 (c) 800
35. 35.74 laddoos are packed in boxes of 6. How many laddoos are left over?
36. 36.30 + 9 =
37. 37.Best estimate of 752 + 225? (a) 1000 (b) 800 (c) 1200
38. 38.37 + 5 =
39. 39.58 − 34 =
40. 40.74 + 21 =

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