Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 785 · 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.Double 61 =
2. 2.80 − 71 =
3. 3.82 + 68 =
4. 4.15 + 8 =
5. 5.107 − 29 =
6. 6.Double 95 =
7. 7.306 + 99 =
8. 8.54 − 44 =
9. 9.You buy a water bottle for ₹284 and pay with a ₹500 note. How much change do you get, in rupees?
10. 10.63 + 79 =
11. 11.567 ÷ 9 =
12. 12.10 + 11 =
13. 13.Double 91 =
14. 14.42 − 29 =
15. 15.86 + 9 =
16. 16.68 + 29 =
17. 17.5% of ₹820 =
18. 18.112 − 89 =
19. 19.546 ÷ 6 =
20. 20.Best estimate of 210 + 878? (a) 900 (b) 1300 (c) 1100
21. 21.15 + 7 =
22. 22.75 + 8 =
23. 23.78 + 3 =
24. 24.25% of ₹820 =
25. 25.You buy a water bottle for ₹37 and a pen for ₹37. You pay with a ₹100 note. How much change do you get, in rupees?
26. 26.521 − 485 =
27. 27.103 − 94 =
28. 28.75 − 37 =
29. 29.13 + 14 =
30. 30.24 + 26 =
31. 31.6 + ? = 10
32. 32.67 − 37 =
33. 33.Best estimate of 24 × 44? (a) 80 (b) 8000 (c) 800
34. 34.A train leaves at 5:00 and reaches the next city at 5:55. How many minutes is the journey?
35. 35.529 − 493 =
36. 36.15 + 19 =
37. 37.6 + 8 =
38. 38.Best estimate of 326 + 770? (a) 1300 (b) 1100 (c) 900
39. 39.22 × 4 =
40. 40.A train leaves at 5:30 and reaches the next city at 5:55. How many minutes is the journey?

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