Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 453 · 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. 1.22 children stand in rows of 3. How many full rows can they make?
2. 2.34 + ? = 100
3. 3.56 − 19 =
4. 4.85 − 67 =
5. 5.106 children stand in rows of 8. How many full rows can they make?
6. 6.Best estimate of 358 + 777? (a) 1400 (b) 1200 (c) 1000
7. 7.Half of 28 =
8. 8.47 children stand in rows of 5. How many full rows can they make?
9. 9.11² =
10. 10.100 − 69 =
11. 11.80 + ? = 100
12. 12.56 − 36 =
13. 13.A cricket match starts at 5:50 and the first innings ends at 8:35. How many minutes did the innings last?
14. 14.220 − 195 =
15. 15.12² =
16. 16.A train leaves at 4:05 and reaches the next city at 4:50. How many minutes is the journey?
17. 17.18 + 20 =
18. 18.You start your homework at 6:20 and finish at 8:10. How many minutes did you work?
19. 19.12 + ? = 100
20. 20.Half of 54 =
21. 21.Double 57 =
22. 22.176 ÷ 8 =
23. 23.37 × 4 =
24. 24.35 + 23 =
25. 25.Best estimate of 74 × 90? (a) 63000 (b) 630 (c) 6300
26. 26.55 × 8 =
27. 27.5% of ₹310 =
28. 28.19 children stand in rows of 3. How many full rows can they make?
29. 29.68 + 9 =
30. 30.48 + 6 =
31. 31.93 − 67 =
32. 32.52 × 5 =
33. 33.68 + ? = 100
34. 34.35 − 19 =
35. 35.9 + 11 =
36. 36.Best estimate of 841 + 502? (a) 1500 (b) 1100 (c) 1300
37. 37.A film starts at 5:35 and ends at 7:40. How many minutes long is the film?
38. 38.70 − 49 =
39. 39.728 ÷ 8 =
40. 40.47 children stand in rows of 4. How many full rows can they make?

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