Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 327 · 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 32 × 58? (a) 1800 (b) 180 (c) 18000
2. 2.35 × 8 =
3. 3.You buy a box of crayons for ₹30 and pay with a ₹100 note. How much change do you get, in rupees?
4. 4.12 + 14 =
5. 5.Half of 70 =
6. 6.50% of ₹220 =
7. 7.224 ÷ 4 =
8. 8.25% of ₹290 =
9. 9.35 × 4 =
10. 10.66 − 19 =
11. 11.114 − 79 =
12. 12.34 + 49 =
13. 13.15² =
14. 14.25% of ₹400 =
15. 15.98 − 54 =
16. 16.48 + 9 =
17. 17.A film starts at 5:00 and ends at 6:45. How many minutes long is the film?
18. 18.Double 28 =
19. 19.You start your homework at 6:00 and finish at 8:05. How many minutes did you work?
20. 20.14 × 6 =
21. 21.65 − 43 =
22. 22.17² =
23. 23.104 − 91 =
24. 24.5% of ₹280 =
25. 25.48 + 41 =
26. 26.83 × 3 =
27. 27.59 − 15 =
28. 28.55 × 7 =
29. 29.20 + 22 =
30. 30.75 × 4 =
31. 31.83 + 53 =
32. 32.Half of 52 =
33. 33.82 − 23 =
34. 34.56 + 9 =
35. 35.19 + ? = 100
36. 36.51 − 9 =
37. 37.You buy a storybook for ₹77 and pay with a ₹100 note. How much change do you get, in rupees?
38. 38.You buy a bag of mangoes for ₹18 and a pen for ₹44. You pay with a ₹100 note. How much change do you get, in rupees?
39. 39.783 + 99 =
40. 40.You buy a bag of mangoes for ₹35 and pay with a ₹100 note. How much change do you get, in rupees?

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