Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 450 · 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. 1.82 children stand in rows of 7. How many full rows can they make?
2. 2.50% of ₹500 =
3. 3.15² =
4. 4.A film starts at 3:05 and ends at 5:20. How many minutes long is the film?
5. 5.496 + 99 =
6. 6.Best estimate of 14 × 80? (a) 800 (b) 8000 (c) 80
7. 7.87 ÷ 3 =
8. 8.82 − 56 =
9. 9.Half of 70 =
10. 10.16² =
11. 11.25% of ₹140 =
12. 12.6 + 5 =
13. 13.308 − 276 =
14. 14.Best estimate of 599 + 808? (a) 1400 (b) 1600 (c) 1200
15. 15.25 × 8 =
16. 16.65 + 19 =
17. 17.86 − 56 =
18. 18.23 + 29 =
19. 19.You buy a box of crayons for ₹14 and pay with a ₹100 note. How much change do you get, in rupees?
20. 20.416 ÷ 8 =
21. 21.21² =
22. 22.You buy a cricket ball for ₹86 and pay with a ₹100 note. How much change do you get, in rupees?
23. 23.164 ÷ 4 =
24. 24.48 children stand in rows of 5. How many full rows can they make?
25. 25.49 + 19 =
26. 26.50% of ₹280 =
27. 27.36 − 29 =
28. 28.1019 − 993 =
29. 29.You buy a kite for ₹210 and pay with a ₹500 note. How much change do you get, in rupees?
30. 30.18 + 20 =
31. 31.539 ÷ 7 =
32. 32.11 + 12 =
33. 33.48 + 3 =
34. 34.Best estimate of 391 + 567? (a) 1000 (b) 800 (c) 1200
35. 35.61 − 27 =
36. 36.56 + ? = 100
37. 37.78 − 25 =
38. 38.29 + 31 =
39. 39.20 + 22 =
40. 40.18 + 7 =

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