Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 383 · 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. 1.112 ÷ 8 =
2. 2.38 + ? = 100
3. 3.256 ÷ 8 =
4. 4.27² =
5. 5.Half of 112 =
6. 6.56 − 27 =
7. 7.38 + 51 =
8. 8.34 × 8 =
9. 9.Half of 106 =
10. 10.8 + 9 =
11. 11.10% of ₹830 =
12. 12.79 + 36 =
13. 13.18 + 9 =
14. 14.61 + 57 =
15. 15.You buy a notebook for ₹86 and pay with a ₹100 note. How much change do you get, in rupees?
16. 16.513 − 486 =
17. 17.60 + 9 =
18. 18.A cricket match starts at 1:30 and the first innings ends at 1:55. How many minutes did the innings last?
19. 19.69 + 49 =
20. 20.25 + 26 =
21. 21.62 − 25 =
22. 22.You start your homework at 8:15 and finish at 11:05. How many minutes did you work?
23. 23.63 − 22 =
24. 24.2 + ? = 10
25. 25.Best estimate of 263 + 637? (a) 700 (b) 900 (c) 1100
26. 26.A cricket match starts at 8:25 and the first innings ends at 9:10. How many minutes did the innings last?
27. 27.16 + ? = 100
28. 28.305 ÷ 5 =
29. 29.273 ÷ 3 =
30. 30.40 + 9 =
31. 31.Best estimate of 691 + 846? (a) 1500 (b) 1300 (c) 1700
32. 32.184 + 99 =
33. 33.26 + 51 =
34. 34.29 + 66 =
35. 35.31 × 8 =
36. 36.18 × 5 =
37. 37.You buy a box of crayons for ₹32 and pay with a ₹100 note. How much change do you get, in rupees?
38. 38.You buy a pencil box for ₹51 and pay with a ₹100 note. How much change do you get, in rupees?
39. 39.24² =
40. 40.You buy a kite for ₹53 and pay with a ₹100 note. How much change do you get, in rupees?

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