Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 570 · 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.Best estimate of 854 + 557? (a) 1700 (b) 1500 (c) 1300
2. 2.5% of ₹530 =
3. 3.72 − 17 =
4. 4.215 − 186 =
5. 5.3 + ? = 10
6. 6.89 + 7 =
7. 7.2 + ? = 10
8. 8.246 ÷ 3 =
9. 9.Best estimate of 29 × 77? (a) 24000 (b) 240 (c) 2400
10. 10.319 − 296 =
11. 11.14 + ? = 100
12. 12.38 + 9 =
13. 13.536 ÷ 8 =
14. 14.95 − 37 =
15. 15.55 + 6 =
16. 16.7 + 9 =
17. 17.75 laddoos are packed in boxes of 8. How many laddoos are left over?
18. 18.77 + 86 =
19. 19.19² =
20. 20.78 laddoos are packed in boxes of 5. How many laddoos are left over?
21. 21.300 ÷ 4 =
22. 22.372 ÷ 6 =
23. 23.765 ÷ 9 =
24. 24.75 + 9 =
25. 25.Half of 192 =
26. 26.22 children stand in rows of 3. How many full rows can they make?
27. 27.11 + 13 =
28. 28.22 + 24 =
29. 29.Best estimate of 16 × 57? (a) 12000 (b) 1200 (c) 120
30. 30.A cricket match starts at 5:15 and the first innings ends at 6:05. How many minutes did the innings last?
31. 31.Double 81 =
32. 32.What is the remainder when 37 is divided by 3?
33. 33.68 − 21 =
34. 34.39 × 8 =
35. 35.8 + ? = 10
36. 36.64 + 48 =
37. 37.A cricket match starts at 8:00 and the first innings ends at 8:45. How many minutes did the innings last?
38. 38.75 × 5 =
39. 39.You buy a notebook for ₹109 and pay with a ₹500 note. How much change do you get, in rupees?
40. 40.25² =

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