Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 171 · 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.You start your homework at 7:50 and finish at 10:05. How many minutes did you work?
2. 2.95 × 5 =
3. 3.162 ÷ 6 =
4. 4.Best estimate of 66 × 36? (a) 280 (b) 28000 (c) 2800
5. 5.87 − 56 =
6. 6.You buy a box of crayons for ₹378 and pay with a ₹500 note. How much change do you get, in rupees?
7. 7.You buy a bag of mangoes for ₹483 and pay with a ₹500 note. How much change do you get, in rupees?
8. 8.832 − 99 =
9. 9.26² =
10. 10.230 − 191 =
11. 11.Half of 106 =
12. 12.68 × 4 =
13. 13.19 × 8 =
14. 14.89 − 29 =
15. 15.684 ÷ 9 =
16. 16.93 − 48 =
17. 17.Best estimate of 48 × 26? (a) 1500 (b) 15000 (c) 150
18. 18.58 − 41 =
19. 19.68 ÷ 4 =
20. 20.Best estimate of 79 × 66? (a) 5600 (b) 56000 (c) 560
21. 21.50% of ₹170 =
22. 22.25% of ₹140 =
23. 23.55 + 6 =
24. 24.488 ÷ 8 =
25. 25.10% of ₹40 =
26. 26.3 + ? = 10
27. 27.22 + ? = 100
28. 28.8 + ? = 10
29. 29.10% of ₹130 =
30. 30.107 − 80 =
31. 31.You start your homework at 6:15 and finish at 6:45. How many minutes did you work?
32. 32.23 × 8 =
33. 33.27 + 28 =
34. 34.What is the remainder when 80 is divided by 6?
35. 35.59 + 9 =
36. 36.6 + 7 =
37. 37.A cricket match starts at 8:40 and the first innings ends at 9:20. How many minutes did the innings last?
38. 38.Best estimate of 337 + 167? (a) 300 (b) 500 (c) 700
39. 39.A film starts at 5:40 and ends at 8:35. How many minutes long is the film?
40. 40.74 − 44 =

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