Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 65 · 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.You buy a water bottle for ₹17 and a pen for ₹19. You pay with a ₹100 note. How much change do you get, in rupees?
2. 2.A train leaves at 4:40 and reaches the next city at 5:05. How many minutes is the journey?
3. 3.57 − 16 =
4. 4.24 + ? = 100
5. 5.35 + 8 =
6. 6.485 ÷ 5 =
7. 7.A cricket match starts at 5:50 and the first innings ends at 7:35. How many minutes did the innings last?
8. 8.A film starts at 8:25 and ends at 11:35. How many minutes long is the film?
9. 9.62 + 86 =
10. 10.30 + ? = 100
11. 11.75 − 24 =
12. 12.63 + 9 =
13. 13.49 + 74 =
14. 14.What is the remainder when 36 is divided by 5?
15. 15.47 + ? = 100
16. 16.91 × 9 =
17. 17.16 × 5 =
18. 18.67 + 9 =
19. 19.66 × 4 =
20. 20.15 + 29 =
21. 21.15² =
22. 22.48 + 29 =
23. 23.What is the remainder when 81 is divided by 6?
24. 24.Double 21 =
25. 25.Best estimate of 20 × 56? (a) 12000 (b) 120 (c) 1200
26. 26.Double 16 =
27. 27.37 + 5 =
28. 28.26 × 8 =
29. 29.30 − 19 =
30. 30.5% of ₹600 =
31. 31.43 + 52 =
32. 32.Best estimate of 14 × 57? (a) 6000 (b) 60 (c) 600
33. 33.16 × 8 =
34. 34.25% of ₹60 =
35. 35.35 + ? = 100
36. 36.230 ÷ 5 =
37. 37.You buy a notebook for ₹170 and pay with a ₹500 note. How much change do you get, in rupees?
38. 38.9 + ? = 10
39. 39.31 + ? = 100
40. 40.27² =

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