Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 126 · 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. 1.57 laddoos are packed in boxes of 4. How many laddoos are left over?
2. 2.4 + ? = 10
3. 3.Half of 110 =
4. 4.Double 31 =
5. 5.47 laddoos are packed in boxes of 3. How many laddoos are left over?
6. 6.12² =
7. 7.85 × 8 =
8. 8.A cricket match starts at 5:30 and the first innings ends at 8:20. How many minutes did the innings last?
9. 9.You start your homework at 5:15 and finish at 7:30. How many minutes did you work?
10. 10.11 + 12 =
11. 11.378 ÷ 9 =
12. 12.511 − 479 =
13. 13.50% of ₹780 =
14. 14.248 ÷ 8 =
15. 15.Best estimate of 52 × 14? (a) 500 (b) 50 (c) 5000
16. 16.73 × 6 =
17. 17.21² =
18. 18.13² =
19. 19.49 − 9 =
20. 20.29 + ? = 100
21. 21.52 ÷ 4 =
22. 22.549 ÷ 9 =
23. 23.56 + ? = 100
24. 24.1 + ? = 10
25. 25.54 − 24 =
26. 26.17² =
27. 27.76 + 9 =
28. 28.44 laddoos are packed in boxes of 5. How many laddoos are left over?
29. 29.39 + 4 =
30. 30.88 + ? = 100
31. 31.26 + 25 =
32. 32.Best estimate of 165 + 738? (a) 900 (b) 1100 (c) 700
33. 33.48 + 31 =
34. 34.Half of 36 =
35. 35.205 ÷ 5 =
36. 36.A train leaves at 1:40 and reaches the next city at 3:40. How many minutes is the journey?
37. 37.You buy a storybook for ₹278 and pay with a ₹500 note. How much change do you get, in rupees?
38. 38.78 + 31 =
39. 39.84 + 62 =
40. 40.6 + 7 =

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