Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 720 · 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 23 × 92? (a) 18000 (b) 1800 (c) 180
2. 2.8 + 9 =
3. 3.Best estimate of 549 + 151? (a) 900 (b) 500 (c) 700
4. 4.Best estimate of 224 + 492? (a) 500 (b) 700 (c) 900
5. 5.87 + 4 =
6. 6.24 + 25 =
7. 7.52 − 21 =
8. 8.Half of 138 =
9. 9.364 ÷ 4 =
10. 10.21² =
11. 11.168 ÷ 8 =
12. 12.73 + 29 =
13. 13.91 × 6 =
14. 14.84 × 9 =
15. 15.38 + 19 =
16. 16.What is the remainder when 50 is divided by 8?
17. 17.21 + 52 =
18. 18.152 ÷ 4 =
19. 19.52 + 31 =
20. 20.23 + 22 =
21. 21.29 × 8 =
22. 22.72 × 4 =
23. 23.15 × 8 =
24. 24.A cricket match starts at 1:05 and the first innings ends at 2:25. How many minutes did the innings last?
25. 25.40 + 25 =
26. 26.52 × 5 =
27. 27.Best estimate of 213 + 229? (a) 400 (b) 200 (c) 600
28. 28.51 laddoos are packed in boxes of 8. How many laddoos are left over?
29. 29.What is the remainder when 80 is divided by 6?
30. 30.25% of ₹60 =
31. 31.50% of ₹550 =
32. 32.A film starts at 5:20 and ends at 8:10. How many minutes long is the film?
33. 33.25% of ₹480 =
34. 34.236 ÷ 4 =
35. 35.A cricket match starts at 1:10 and the first innings ends at 1:50. How many minutes did the innings last?
36. 36.104 − 76 =
37. 37.5% of ₹580 =
38. 38.A film starts at 7:05 and ends at 9:50. How many minutes long is the film?
39. 39.57 × 8 =
40. 40.11² =

Free mental maths lessons, practice and worksheets at talentjr.in/mental-maths