Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 790 · 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. 1.100 ÷ 4 =
2. 2.What is the remainder when 45 is divided by 4?
3. 3.54 + 77 =
4. 4.Best estimate of 257 + 568? (a) 1100 (b) 700 (c) 900
5. 5.Half of 194 =
6. 6.160 ÷ 4 =
7. 7.76 + 7 =
8. 8.73 + 76 =
9. 9.63 × 4 =
10. 10.71 × 7 =
11. 11.42 + ? = 100
12. 12.94 − 53 =
13. 13.45 + 6 =
14. 14.What is the remainder when 23 is divided by 3?
15. 15.73 + 9 =
16. 16.12 + 14 =
17. 17.221 − 180 =
18. 18.61 + 28 =
19. 19.508 − 494 =
20. 20.26² =
21. 21.13 × 8 =
22. 22.77 − 17 =
23. 23.45 children stand in rows of 6. How many full rows can they make?
24. 24.64 − 19 =
25. 25.Best estimate of 54 × 24? (a) 1000 (b) 100 (c) 10000
26. 26.You start your homework at 4:15 and finish at 5:00. How many minutes did you work?
27. 27.26 laddoos are packed in boxes of 6. How many laddoos are left over?
28. 28.74 + 23 =
29. 29.108 ÷ 9 =
30. 30.60 − 9 =
31. 31.What is the remainder when 49 is divided by 6?
32. 32.229 + 99 =
33. 33.Best estimate of 91 × 56? (a) 540 (b) 54000 (c) 5400
34. 34.68 ÷ 4 =
35. 35.50% of ₹630 =
36. 36.321 − 297 =
37. 37.61 × 9 =
38. 38.Best estimate of 498 + 530? (a) 1200 (b) 800 (c) 1000
39. 39.30 + 32 =
40. 40.73 + 26 =

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