Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 233 · 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. 1.25% of ₹360 =
2. 2.Best estimate of 571 + 570? (a) 1400 (b) 1200 (c) 1000
3. 3.248 ÷ 8 =
4. 4.27 + 83 =
5. 5.You buy a box of crayons for ₹30 and pay with a ₹100 note. How much change do you get, in rupees?
6. 6.89 − 9 =
7. 7.56 + 19 =
8. 8.516 − 484 =
9. 9.50% of ₹60 =
10. 10.95 − 25 =
11. 11.You start your homework at 2:20 and finish at 5:20. How many minutes did you work?
12. 12.106 − 62 =
13. 13.68 + 9 =
14. 14.245 ÷ 5 =
15. 15.You buy a cricket ball for ₹18 and a pen for ₹16. You pay with a ₹100 note. How much change do you get, in rupees?
16. 16.308 − 298 =
17. 17.63 − 41 =
18. 18.10% of ₹670 =
19. 19.10 + 12 =
20. 20.68 − 29 =
21. 21.85 + 6 =
22. 22.A train leaves at 6:15 and reaches the next city at 7:50. How many minutes is the journey?
23. 23.364 ÷ 4 =
24. 24.82 − 56 =
25. 25.Best estimate of 243 + 771? (a) 800 (b) 1000 (c) 1200
26. 26.104 ÷ 8 =
27. 27.You buy a bag of mangoes for ₹22 and a pen for ₹32. You pay with a ₹100 note. How much change do you get, in rupees?
28. 28.85 + 7 =
29. 29.16 × 8 =
30. 30.Best estimate of 183 + 216? (a) 200 (b) 400 (c) 600
31. 31.27² =
32. 32.50% of ₹530 =
33. 33.31 × 8 =
34. 34.A film starts at 8:15 and ends at 10:55. How many minutes long is the film?
35. 35.74 + ? = 100
36. 36.19 × 8 =
37. 37.Best estimate of 74 × 74? (a) 490 (b) 49000 (c) 4900
38. 38.29² =
39. 39.311 − 281 =
40. 40.43 × 3 =

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