Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 94 · 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. 1.98 − 18 =
2. 2.66 − 29 =
3. 3.Best estimate of 92 × 81? (a) 7200 (b) 720 (c) 72000
4. 4.10% of ₹350 =
5. 5.1022 − 987 =
6. 6.44 laddoos are packed in boxes of 3. How many laddoos are left over?
7. 7.46 children stand in rows of 4. How many full rows can they make?
8. 8.45 + 9 =
9. 9.4 + ? = 10
10. 10.85 laddoos are packed in boxes of 9. How many laddoos are left over?
11. 11.13 + 12 =
12. 12.1011 − 990 =
13. 13.26² =
14. 14.22 + 21 =
15. 15.224 ÷ 8 =
16. 16.216 ÷ 8 =
17. 17.76 + 66 =
18. 18.71 + 29 =
19. 19.A train leaves at 2:55 and reaches the next city at 4:55. How many minutes is the journey?
20. 20.162 ÷ 3 =
21. 21.19² =
22. 22.29 + 31 =
23. 23.27 + 26 =
24. 24.50% of ₹360 =
25. 25.32 × 8 =
26. 26.12² =
27. 27.84 ÷ 4 =
28. 28.6 + 8 =
29. 29.43 + 29 =
30. 30.48 + 51 =
31. 31.44 + ? = 100
32. 32.Half of 136 =
33. 33.309 − 276 =
34. 34.You buy a box of crayons for ₹99 and pay with a ₹100 note. How much change do you get, in rupees?
35. 35.16 + 9 =
36. 36.Double 33 =
37. 37.15 × 8 =
38. 38.A film starts at 2:45 and ends at 5:25. How many minutes long is the film?
39. 39.99 − 28 =
40. 40.41 children stand in rows of 8. How many full rows can they make?

Free mental maths lessons, practice and worksheets at talentjr.in/mental-maths