Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 392 · 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.You buy a water bottle for ₹44 and pay with a ₹100 note. How much change do you get, in rupees?
2. 2.16² =
3. 3.68 + 4 =
4. 4.66 + 14 =
5. 5.57 + 9 =
6. 6.595 ÷ 7 =
7. 7.Double 85 =
8. 8.73 × 6 =
9. 9.59 − 25 =
10. 10.252 ÷ 9 =
11. 11.50% of ₹60 =
12. 12.109 − 29 =
13. 13.85 + 56 =
14. 14.25% of ₹120 =
15. 15.13 × 7 =
16. 16.5 + ? = 10
17. 17.86 + ? = 100
18. 18.54 + ? = 100
19. 19.678 + 99 =
20. 20.317 − 297 =
21. 21.10 + 11 =
22. 22.53 × 4 =
23. 23.2 + ? = 10
24. 24.18 × 6 =
25. 25.You buy a bag of mangoes for ₹24 and a pen for ₹31. You pay with a ₹100 note. How much change do you get, in rupees?
26. 26.You buy a bag of mangoes for ₹286 and pay with a ₹500 note. How much change do you get, in rupees?
27. 27.52 + ? = 100
28. 28.51 − 19 =
29. 29.18² =
30. 30.25 × 8 =
31. 31.22² =
32. 32.75 − 15 =
33. 33.Best estimate of 37 × 68? (a) 280 (b) 28000 (c) 2800
34. 34.315 − 277 =
35. 35.You start your homework at 1:55 and finish at 5:15. How many minutes did you work?
36. 36.A train leaves at 1:05 and reaches the next city at 1:45. How many minutes is the journey?
37. 37.114 − 87 =
38. 38.73 × 3 =
39. 39.77 + 71 =
40. 40.Half of 32 =

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