Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 167 · 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. 1.39 × 8 =
2. 2.52 × 5 =
3. 3.A cricket match starts at 2:45 and the first innings ends at 4:15. How many minutes did the innings last?
4. 4.98 × 7 =
5. 5.Best estimate of 81 × 68? (a) 56000 (b) 560 (c) 5600
6. 6.15² =
7. 7.176 ÷ 8 =
8. 8.21 × 8 =
9. 9.14 + 19 =
10. 10.4 + ? = 10
11. 11.Double 78 =
12. 12.203 − 182 =
13. 13.5% of ₹120 =
14. 14.You start your homework at 6:05 and finish at 8:55. How many minutes did you work?
15. 15.8 + ? = 10
16. 16.22² =
17. 17.A cricket match starts at 1:20 and the first innings ends at 2:10. How many minutes did the innings last?
18. 18.Double 19 =
19. 19.20 × 8 =
20. 20.85 + 54 =
21. 21.28 + 31 =
22. 22.84 + 78 =
23. 23.22 × 8 =
24. 24.35 + 7 =
25. 25.17 + 4 =
26. 26.60 ÷ 4 =
27. 27.40 laddoos are packed in boxes of 6. How many laddoos are left over?
28. 28.Double 23 =
29. 29.Best estimate of 59 × 51? (a) 30000 (b) 3000 (c) 300
30. 30.1011 − 987 =
31. 31.You buy a water bottle for ₹406 and pay with a ₹500 note. How much change do you get, in rupees?
32. 32.232 ÷ 4 =
33. 33.24² =
34. 34.52 × 4 =
35. 35.14² =
36. 36.27 + 29 =
37. 37.9 + 8 =
38. 38.25% of ₹410 =
39. 39.152 ÷ 8 =
40. 40.You start your homework at 4:40 and finish at 6:35. How many minutes did you work?

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