Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 884 · 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. 1.13 + 9 =
2. 2.52 ÷ 4 =
3. 3.A train leaves at 8:35 and reaches the next city at 9:50. How many minutes is the journey?
4. 4.Best estimate of 791 + 268? (a) 1100 (b) 1300 (c) 900
5. 5.50 + 9 =
6. 6.8 + 10 =
7. 7.Best estimate of 17 × 52? (a) 1000 (b) 10000 (c) 100
8. 8.Double 17 =
9. 9.60 ÷ 4 =
10. 10.You buy a kite for ₹78 and pay with a ₹100 note. How much change do you get, in rupees?
11. 11.5 + ? = 10
12. 12.Best estimate of 36 × 66? (a) 2800 (b) 280 (c) 28000
13. 13.25% of ₹40 =
14. 14.39 + 7 =
15. 15.85 − 74 =
16. 16.A train leaves at 2:30 and reaches the next city at 3:10. How many minutes is the journey?
17. 17.2 + ? = 10
18. 18.Half of 106 =
19. 19.Best estimate of 457 + 571? (a) 1100 (b) 900 (c) 1300
20. 20.8 + 9 =
21. 21.116 − 94 =
22. 22.44 + ? = 100
23. 23.67 + ? = 100
24. 24.56 + 6 =
25. 25.1002 − 992 =
26. 26.Best estimate of 71 × 59? (a) 42000 (b) 420 (c) 4200
27. 27.31 + ? = 100
28. 28.44 + 64 =
29. 29.6 + 9 =
30. 30.19 + 4 =
31. 31.30 + 31 =
32. 32.41 + 56 =
33. 33.A film starts at 8:45 and ends at 9:45. How many minutes long is the film?
34. 34.Half of 38 =
35. 35.Half of 142 =
36. 36.66 × 4 =
37. 37.Half of 94 =
38. 38.13 + 15 =
39. 39.82 + ? = 100
40. 40.55 + 7 =

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