Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 230 · 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. 1.103 − 92 =
2. 2.82 − 67 =
3. 3.9 + ? = 10
4. 4.Best estimate of 56 × 58? (a) 36000 (b) 3600 (c) 360
5. 5.Half of 132 =
6. 6.8 + ? = 10
7. 7.103 − 91 =
8. 8.66 − 9 =
9. 9.69 + 9 =
10. 10.58 + 9 =
11. 11.19 + 2 =
12. 12.97 − 62 =
13. 13.You start your homework at 3:25 and finish at 6:05. How many minutes did you work?
14. 14.What is the remainder when 22 is divided by 3?
15. 15.64 laddoos are packed in boxes of 9. How many laddoos are left over?
16. 16.21² =
17. 17.33 + ? = 100
18. 18.You buy a kite for ₹27 and pay with a ₹100 note. How much change do you get, in rupees?
19. 19.79 × 3 =
20. 20.21 + 88 =
21. 21.57 − 12 =
22. 22.20 + ? = 100
23. 23.55 + 21 =
24. 24.46 × 5 =
25. 25.368 ÷ 8 =
26. 26.35 + 62 =
27. 27.5% of ₹720 =
28. 28.231 ÷ 3 =
29. 29.3 + ? = 10
30. 30.13² =
31. 31.65 − 29 =
32. 32.55 + 6 =
33. 33.Best estimate of 198 + 794? (a) 800 (b) 1000 (c) 1200
34. 34.What is the remainder when 74 is divided by 8?
35. 35.72 × 8 =
36. 36.99 × 3 =
37. 37.22 × 8 =
38. 38.You buy a notebook for ₹80 and pay with a ₹100 note. How much change do you get, in rupees?
39. 39.A film starts at 2:45 and ends at 4:05. How many minutes long is the film?
40. 40.67 + 19 =

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