Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 879 · 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 notebook for ₹50 and pay with a ₹100 note. How much change do you get, in rupees?
2. 2.Double 53 =
3. 3.14 + 16 =
4. 4.505 − 492 =
5. 5.Best estimate of 36 × 94? (a) 3600 (b) 360 (c) 36000
6. 6.3 + ? = 10
7. 7.57 + 7 =
8. 8.85 + 9 =
9. 9.36 children stand in rows of 7. How many full rows can they make?
10. 10.72 + ? = 100
11. 11.13² =
12. 12.60 + 18 =
13. 13.Best estimate of 84 × 21? (a) 1600 (b) 160 (c) 16000
14. 14.You buy a box of crayons for ₹45 and pay with a ₹100 note. How much change do you get, in rupees?
15. 15.Best estimate of 37 × 83? (a) 3200 (b) 320 (c) 32000
16. 16.74 + 9 =
17. 17.31 + 29 =
18. 18.15 + 9 =
19. 19.82 + 22 =
20. 20.17 + 9 =
21. 21.A film starts at 6:55 and ends at 9:10. How many minutes long is the film?
22. 22.A cricket match starts at 1:55 and the first innings ends at 5:05. How many minutes did the innings last?
23. 23.Half of 26 =
24. 24.55 − 32 =
25. 25.28 laddoos are packed in boxes of 3. How many laddoos are left over?
26. 26.51 − 33 =
27. 27.243 ÷ 3 =
28. 28.79 + 5 =
29. 29.69 × 4 =
30. 30.240 ÷ 8 =
31. 31.2 + ? = 10
32. 32.31 children stand in rows of 4. How many full rows can they make?
33. 33.Best estimate of 765 + 468? (a) 1500 (b) 1300 (c) 1100
34. 34.A cricket match starts at 5:45 and the first innings ends at 8:40. How many minutes did the innings last?
35. 35.41 − 9 =
36. 36.11² =
37. 37.15 + 6 =
38. 38.Half of 68 =
39. 39.200 ÷ 8 =
40. 40.Double 26 =

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