Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 451 · 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. 1.18 × 7 =
2. 2.228 ÷ 4 =
3. 3.54 + 53 =
4. 4.70 − 46 =
5. 5.25% of ₹480 =
6. 6.83 − 29 =
7. 7.1005 − 978 =
8. 8.13 + 12 =
9. 9.36 × 8 =
10. 10.52 × 4 =
11. 11.15² =
12. 12.37 − 19 =
13. 13.24 + 9 =
14. 14.Best estimate of 544 + 355? (a) 700 (b) 1100 (c) 900
15. 15.62 × 7 =
16. 16.160 ÷ 8 =
17. 17.49 + 83 =
18. 18.290 ÷ 5 =
19. 19.Best estimate of 88 × 49? (a) 45000 (b) 4500 (c) 450
20. 20.48 ÷ 3 =
21. 21.10% of ₹450 =
22. 22.28² =
23. 23.You buy a cricket ball for ₹66 and pay with a ₹100 note. How much change do you get, in rupees?
24. 24.A cricket match starts at 6:40 and the first innings ends at 9:00. How many minutes did the innings last?
25. 25.47 children stand in rows of 5. How many full rows can they make?
26. 26.50% of ₹180 =
27. 27.85 + 7 =
28. 28.15 × 8 =
29. 29.108 − 94 =
30. 30.23 + 24 =
31. 31.33 × 4 =
32. 32.Best estimate of 743 + 645? (a) 1300 (b) 1100 (c) 1500
33. 33.You buy a kite for ₹480 and pay with a ₹500 note. How much change do you get, in rupees?
34. 34.12 − 9 =
35. 35.25² =
36. 36.69 + 66 =
37. 37.8 + ? = 10
38. 38.585 ÷ 9 =
39. 39.Best estimate of 70 × 27? (a) 2100 (b) 210 (c) 21000
40. 40.52 + 9 =

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