Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 747 · 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. 1.5% of ₹250 =
2. 2.99 − 65 =
3. 3.10% of ₹350 =
4. 4.75 + 8 =
5. 5.A train leaves at 8:25 and reaches the next city at 9:40. How many minutes is the journey?
6. 6.248 ÷ 8 =
7. 7.Best estimate of 71 × 33? (a) 2100 (b) 210 (c) 21000
8. 8.217 − 178 =
9. 9.Best estimate of 90 × 56? (a) 540 (b) 5400 (c) 54000
10. 10.70 − 44 =
11. 11.Half of 86 =
12. 12.43 + 12 =
13. 13.287 + 99 =
14. 14.What is the remainder when 28 is divided by 3?
15. 15.18 + 20 =
16. 16.74 + 81 =
17. 17.24² =
18. 18.Best estimate of 20 × 90? (a) 18000 (b) 180 (c) 1800
19. 19.12 + ? = 100
20. 20.68 + 29 =
21. 21.492 + 99 =
22. 22.130 ÷ 5 =
23. 23.55 children stand in rows of 4. How many full rows can they make?
24. 24.A cricket match starts at 1:25 and the first innings ends at 2:05. How many minutes did the innings last?
25. 25.45 + ? = 100
26. 26.86 + 57 =
27. 27.You buy a notebook for ₹41 and a pen for ₹30. You pay with a ₹100 note. How much change do you get, in rupees?
28. 28.You buy a pencil box for ₹301 and pay with a ₹500 note. How much change do you get, in rupees?
29. 29.188 ÷ 4 =
30. 30.27 × 5 =
31. 31.50% of ₹660 =
32. 32.87 + 5 =
33. 33.32 × 4 =
34. 34.You buy a cricket ball for ₹78 and pay with a ₹100 note. How much change do you get, in rupees?
35. 35.75 − 29 =
36. 36.27 × 8 =
37. 37.20 × 8 =
38. 38.50 × 4 =
39. 39.17 × 4 =
40. 40.180 ÷ 5 =

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