Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 397 · 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. 1.25² =
2. 2.48 × 8 =
3. 3.82 × 8 =
4. 4.85 − 71 =
5. 5.What is the remainder when 32 is divided by 3?
6. 6.58 + 14 =
7. 7.Double 56 =
8. 8.97 − 77 =
9. 9.5 + ? = 10
10. 10.26 + 27 =
11. 11.33 × 8 =
12. 12.A train leaves at 8:35 and reaches the next city at 10:15. How many minutes is the journey?
13. 13.Double 23 =
14. 14.Best estimate of 787 + 825? (a) 1400 (b) 1600 (c) 1800
15. 15.21² =
16. 16.You buy a pencil box for ₹20 and pay with a ₹100 note. How much change do you get, in rupees?
17. 17.A film starts at 1:10 and ends at 2:30. How many minutes long is the film?
18. 18.18 + ? = 100
19. 19.36 − 19 =
20. 20.25% of ₹560 =
21. 21.10% of ₹60 =
22. 22.14 × 8 =
23. 23.43 + ? = 100
24. 24.25% of ₹40 =
25. 25.A cricket match starts at 2:45 and the first innings ends at 3:10. How many minutes did the innings last?
26. 26.8 + 9 =
27. 27.43 laddoos are packed in boxes of 3. How many laddoos are left over?
28. 28.603 + 99 =
29. 29.A train leaves at 6:45 and reaches the next city at 8:20. How many minutes is the journey?
30. 30.You buy a box of crayons for ₹56 and pay with a ₹100 note. How much change do you get, in rupees?
31. 31.13² =
32. 32.7 + 8 =
33. 33.54 − 43 =
34. 34.22 × 4 =
35. 35.50% of ₹780 =
36. 36.53 × 4 =
37. 37.What is the remainder when 49 is divided by 8?
38. 38.Best estimate of 98 × 81? (a) 8000 (b) 80000 (c) 800
39. 39.600 ÷ 8 =
40. 40.28² =

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