Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 805 · 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. 1.47 − 19 =
2. 2.152 ÷ 8 =
3. 3.52 − 9 =
4. 4.1029 − 979 =
5. 5.A film starts at 8:35 and ends at 10:45. How many minutes long is the film?
6. 6.You start your homework at 3:55 and finish at 5:20. How many minutes did you work?
7. 7.38 × 8 =
8. 8.65 − 27 =
9. 9.132 ÷ 4 =
10. 10.19 × 8 =
11. 11.15 × 5 =
12. 12.Best estimate of 30 × 31? (a) 900 (b) 9000 (c) 90
13. 13.55 − 29 =
14. 14.33 × 9 =
15. 15.You buy a kite for ₹50 and pay with a ₹100 note. How much change do you get, in rupees?
16. 16.13 + ? = 100
17. 17.50% of ₹380 =
18. 18.216 ÷ 8 =
19. 19.5 + ? = 10
20. 20.1002 − 989 =
21. 21.5% of ₹310 =
22. 22.8 + ? = 10
23. 23.23 + 19 =
24. 24.You buy a kite for ₹45 and a pen for ₹42. You pay with a ₹100 note. How much change do you get, in rupees?
25. 25.25% of ₹580 =
26. 26.110 − 66 =
27. 27.Best estimate of 92 × 51? (a) 4500 (b) 450 (c) 45000
28. 28.18² =
29. 29.33 + 29 =
30. 30.You buy a bag of mangoes for ₹400 and pay with a ₹500 note. How much change do you get, in rupees?
31. 31.22 × 3 =
32. 32.37 × 4 =
33. 33.22 + 21 =
34. 34.136 ÷ 4 =
35. 35.A train leaves at 7:30 and reaches the next city at 10:30. How many minutes is the journey?
36. 36.176 ÷ 4 =
37. 37.You start your homework at 4:25 and finish at 5:20. How many minutes did you work?
38. 38.105 ÷ 3 =
39. 39.6 + 8 =
40. 40.536 − 99 =

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