Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 315 · 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. 1.17 + 16 =
2. 2.314 − 295 =
3. 3.22 + 61 =
4. 4.73 + 35 =
5. 5.37 × 7 =
6. 6.Best estimate of 90 × 32? (a) 27000 (b) 270 (c) 2700
7. 7.You start your homework at 6:05 and finish at 8:20. How many minutes did you work?
8. 8.525 − 495 =
9. 9.5% of ₹670 =
10. 10.75 + 6 =
11. 11.10% of ₹800 =
12. 12.Double 34 =
13. 13.16² =
14. 14.305 ÷ 5 =
15. 15.What is the remainder when 68 is divided by 6?
16. 16.50% of ₹400 =
17. 17.509 − 483 =
18. 18.129 − 96 =
19. 19.29² =
20. 20.13 × 8 =
21. 21.25 + 9 =
22. 22.74 − 40 =
23. 23.92 − 61 =
24. 24.A film starts at 3:30 and ends at 6:00. How many minutes long is the film?
25. 25.55 × 4 =
26. 26.16 + ? = 100
27. 27.You buy a cricket ball for ₹51 and pay with a ₹100 note. How much change do you get, in rupees?
28. 28.11 + 10 =
29. 29.204 ÷ 4 =
30. 30.Double 52 =
31. 31.25² =
32. 32.You buy a bag of mangoes for ₹19 and pay with a ₹100 note. How much change do you get, in rupees?
33. 33.225 − 187 =
34. 34.84 + 45 =
35. 35.Half of 92 =
36. 36.What is the remainder when 87 is divided by 8?
37. 37.Double 38 =
38. 38.76 + ? = 100
39. 39.108 ÷ 4 =
40. 40.24² =

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