Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 889 · 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. 1.57 + 47 =
2. 2.28 + ? = 100
3. 3.232 ÷ 4 =
4. 4.136 ÷ 8 =
5. 5.405 ÷ 5 =
6. 6.Best estimate of 18 × 87? (a) 18000 (b) 180 (c) 1800
7. 7.68 + 87 =
8. 8.24 + 15 =
9. 9.121 − 90 =
10. 10.Best estimate of 567 + 591? (a) 1000 (b) 1200 (c) 1400
11. 11.12 − 9 =
12. 12.Best estimate of 837 + 598? (a) 1400 (b) 1200 (c) 1600
13. 13.31 + 26 =
14. 14.87 + ? = 100
15. 15.19 × 5 =
16. 16.68 − 44 =
17. 17.65 − 26 =
18. 18.5% of ₹300 =
19. 19.25% of ₹540 =
20. 20.35 children stand in rows of 3. How many full rows can they make?
21. 21.89 + 6 =
22. 22.168 ÷ 4 =
23. 23.You buy a box of crayons for ₹376 and pay with a ₹500 note. How much change do you get, in rupees?
24. 24.73 + ? = 100
25. 25.A film starts at 7:10 and ends at 8:45. How many minutes long is the film?
26. 26.50% of ₹700 =
27. 27.618 + 99 =
28. 28.Best estimate of 42 × 29? (a) 12000 (b) 120 (c) 1200
29. 29.30 + 9 =
30. 30.You start your homework at 1:05 and finish at 3:50. How many minutes did you work?
31. 31.35 + 8 =
32. 32.A train leaves at 1:40 and reaches the next city at 4:55. How many minutes is the journey?
33. 33.Best estimate of 67 × 68? (a) 49000 (b) 4900 (c) 490
34. 34.45 + 6 =
35. 35.104 − 78 =
36. 36.Best estimate of 28 × 84? (a) 2400 (b) 24000 (c) 240
37. 37.10% of ₹470 =
38. 38.You buy a notebook for ₹344 and pay with a ₹500 note. How much change do you get, in rupees?
39. 39.55 + 6 =
40. 40.175 ÷ 5 =

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