Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 159 · 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. 1.143 + 99 =
2. 2.29 + 7 =
3. 3.19 + 18 =
4. 4.7 + 9 =
5. 5.2 + ? = 10
6. 6.43 × 9 =
7. 7.You start your homework at 7:20 and finish at 9:50. How many minutes did you work?
8. 8.5% of ₹900 =
9. 9.216 − 182 =
10. 10.50% of ₹720 =
11. 11.64 − 24 =
12. 12.463 − 99 =
13. 13.Best estimate of 34 × 96? (a) 30000 (b) 300 (c) 3000
14. 14.9 + 10 =
15. 15.1007 − 980 =
16. 16.58 + 48 =
17. 17.77 + 4 =
18. 18.22 − 9 =
19. 19.25% of ₹110 =
20. 20.69 − 52 =
21. 21.36 + ? = 100
22. 22.Half of 184 =
23. 23.You buy a pencil box for ₹28 and pay with a ₹100 note. How much change do you get, in rupees?
24. 24.20 + 21 =
25. 25.124 ÷ 4 =
26. 26.58 − 16 =
27. 27.You buy a cricket ball for ₹29 and a pen for ₹11. You pay with a ₹100 note. How much change do you get, in rupees?
28. 28.A train leaves at 8:45 and reaches the next city at 9:45. How many minutes is the journey?
29. 29.10 + 12 =
30. 30.You start your homework at 3:25 and finish at 5:30. How many minutes did you work?
31. 31.16 + ? = 100
32. 32.76 + 29 =
33. 33.You buy a notebook for ₹78 and pay with a ₹100 note. How much change do you get, in rupees?
34. 34.24 + 25 =
35. 35.70 − 46 =
36. 36.52 − 28 =
37. 37.Half of 26 =
38. 38.6 + ? = 10
39. 39.301 − 99 =
40. 40.249 ÷ 3 =

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