Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 116 · 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.Double 79 =
2. 2.56 × 4 =
3. 3.99 − 88 =
4. 4.A train leaves at 6:05 and reaches the next city at 7:15. How many minutes is the journey?
5. 5.Half of 194 =
6. 6.27 + 6 =
7. 7.76 + 7 =
8. 8.5 + ? = 10
9. 9.Best estimate of 60 × 89? (a) 540 (b) 5400 (c) 54000
10. 10.27 × 4 =
11. 11.1029 − 976 =
12. 12.13 × 8 =
13. 13.719 + 99 =
14. 14.85 × 9 =
15. 15.648 ÷ 9 =
16. 16.Best estimate of 52 × 26? (a) 15000 (b) 1500 (c) 150
17. 17.224 ÷ 8 =
18. 18.17 × 8 =
19. 19.252 ÷ 6 =
20. 20.296 ÷ 8 =
21. 21.47 laddoos are packed in boxes of 3. How many laddoos are left over?
22. 22.83 + ? = 100
23. 23.50 + ? = 100
24. 24.26² =
25. 25.32 laddoos are packed in boxes of 3. How many laddoos are left over?
26. 26.70 + 9 =
27. 27.58 − 46 =
28. 28.126 ÷ 6 =
29. 29.100 − 66 =
30. 30.A film starts at 1:25 and ends at 2:45. How many minutes long is the film?
31. 31.49 + ? = 100
32. 32.288 ÷ 8 =
33. 33.19 + 20 =
34. 34.2 + ? = 10
35. 35.21² =
36. 36.280 ÷ 8 =
37. 37.A train leaves at 7:15 and reaches the next city at 8:45. How many minutes is the journey?
38. 38.471 − 99 =
39. 39.25% of ₹870 =
40. 40.85 − 21 =

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