Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 175 · 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. 1.64 + 65 =
2. 2.You buy a pencil box for ₹41 and a pen for ₹40. You pay with a ₹100 note. How much change do you get, in rupees?
3. 3.82 + 21 =
4. 4.Half of 92 =
5. 5.12² =
6. 6.144 ÷ 4 =
7. 7.60 − 43 =
8. 8.19 × 8 =
9. 9.3 + ? = 10
10. 10.10 + 12 =
11. 11.You buy a box of crayons for ₹314 and pay with a ₹500 note. How much change do you get, in rupees?
12. 12.18² =
13. 13.9 + 11 =
14. 14.33 + 53 =
15. 15.14 + 15 =
16. 16.729 ÷ 9 =
17. 17.88 laddoos are packed in boxes of 6. How many laddoos are left over?
18. 18.You start your homework at 1:30 and finish at 3:45. How many minutes did you work?
19. 19.26 × 8 =
20. 20.5 + ? = 10
21. 21.59 + 5 =
22. 22.A train leaves at 6:45 and reaches the next city at 8:10. How many minutes is the journey?
23. 23.85 ÷ 5 =
24. 24.32 × 4 =
25. 25.23 + 9 =
26. 26.Half of 76 =
27. 27.8 + 9 =
28. 28.25% of ₹510 =
29. 29.29 + 36 =
30. 30.69 + ? = 100
31. 31.54 − 33 =
32. 32.What is the remainder when 38 is divided by 5?
33. 33.A film starts at 5:40 and ends at 7:35. How many minutes long is the film?
34. 34.513 − 477 =
35. 35.312 − 278 =
36. 36.You buy a cricket ball for ₹94 and pay with a ₹100 note. How much change do you get, in rupees?
37. 37.16 − 9 =
38. 38.44 + 35 =
39. 39.28² =
40. 40.8 + 5 =

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