Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 828 · 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. 1.12² =
2. 2.What is the remainder when 33 is divided by 8?
3. 3.Best estimate of 29 × 21? (a) 6000 (b) 600 (c) 60
4. 4.53 − 23 =
5. 5.You buy a box of crayons for ₹85 and pay with a ₹100 note. How much change do you get, in rupees?
6. 6.37 + 31 =
7. 7.86 − 58 =
8. 8.Half of 28 =
9. 9.112 − 89 =
10. 10.102 − 94 =
11. 11.756 ÷ 9 =
12. 12.16 laddoos are packed in boxes of 3. How many laddoos are left over?
13. 13.20 + ? = 100
14. 14.1004 − 991 =
15. 15.5 + ? = 10
16. 16.85 + ? = 100
17. 17.1013 − 984 =
18. 18.204 ÷ 4 =
19. 19.26 + 65 =
20. 20.You start your homework at 1:45 and finish at 4:40. How many minutes did you work?
21. 21.43 + ? = 100
22. 22.You buy a storybook for ₹26 and pay with a ₹100 note. How much change do you get, in rupees?
23. 23.Best estimate of 346 + 401? (a) 900 (b) 700 (c) 500
24. 24.You buy a bag of mangoes for ₹32 and a pen for ₹30. You pay with a ₹100 note. How much change do you get, in rupees?
25. 25.35 × 4 =
26. 26.238 ÷ 7 =
27. 27.31 + 33 =
28. 28.76 − 49 =
29. 29.75 + 9 =
30. 30.A film starts at 3:00 and ends at 4:05. How many minutes long is the film?
31. 31.507 − 492 =
32. 32.19 × 7 =
33. 33.22 × 9 =
34. 34.33 + 31 =
35. 35.280 ÷ 8 =
36. 36.You buy a box of crayons for ₹19 and pay with a ₹100 note. How much change do you get, in rupees?
37. 37.61 × 5 =
38. 38.Half of 158 =
39. 39.A film starts at 4:40 and ends at 5:50. How many minutes long is the film?
40. 40.5% of ₹710 =

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