Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 728 · 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 239 + 781? (a) 800 (b) 1000 (c) 1200
2. 2.62 children stand in rows of 5. How many full rows can they make?
3. 3.83 × 3 =
4. 4.49 + 71 =
5. 5.18 + 8 =
6. 6.You buy a pencil box for ₹20 and pay with a ₹100 note. How much change do you get, in rupees?
7. 7.A train leaves at 2:05 and reaches the next city at 4:40. How many minutes is the journey?
8. 8.10% of ₹500 =
9. 9.Double 21 =
10. 10.184 ÷ 8 =
11. 11.28 × 4 =
12. 12.25% of ₹790 =
13. 13.209 − 187 =
14. 14.Best estimate of 21 × 89? (a) 1800 (b) 180 (c) 18000
15. 15.14² =
16. 16.39 + ? = 100
17. 17.44 × 5 =
18. 18.76 ÷ 4 =
19. 19.Half of 92 =
20. 20.21 + ? = 100
21. 21.204 − 192 =
22. 22.Double 51 =
23. 23.56 × 4 =
24. 24.74 − 63 =
25. 25.97 × 5 =
26. 26.48 × 4 =
27. 27.29 + 28 =
28. 28.You buy a cricket ball for ₹90 and pay with a ₹100 note. How much change do you get, in rupees?
29. 29.1026 − 980 =
30. 30.Best estimate of 723 + 602? (a) 1500 (b) 1300 (c) 1100
31. 31.6 + 8 =
32. 32.Best estimate of 96 × 77? (a) 80000 (b) 800 (c) 8000
33. 33.73 − 29 =
34. 34.67 + ? = 100
35. 35.What is the remainder when 63 is divided by 8?
36. 36.29² =
37. 37.828 ÷ 9 =
38. 38.Best estimate of 689 + 414? (a) 1100 (b) 900 (c) 1300
39. 39.69 + 25 =
40. 40.Double 74 =

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