Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 200 · 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. 1.12 + 11 =
2. 2.8 + 10 =
3. 3.50 children stand in rows of 6. How many full rows can they make?
4. 4.7 + 6 =
5. 5.89 + 3 =
6. 6.10% of ₹360 =
7. 7.26 × 8 =
8. 8.14² =
9. 9.63 + 9 =
10. 10.50 + 84 =
11. 11.41 + 14 =
12. 12.Best estimate of 856 + 479? (a) 1200 (b) 1400 (c) 1600
13. 13.You buy a cricket ball for ₹11 and a pen for ₹18. You pay with a ₹100 note. How much change do you get, in rupees?
14. 14.21² =
15. 15.Best estimate of 323 + 288? (a) 400 (b) 800 (c) 600
16. 16.110 laddoos are packed in boxes of 9. How many laddoos are left over?
17. 17.55 × 4 =
18. 18.17 + 6 =
19. 19.59 × 4 =
20. 20.246 ÷ 6 =
21. 21.Half of 136 =
22. 22.26² =
23. 23.231 ÷ 7 =
24. 24.36 + ? = 100
25. 25.13 + 14 =
26. 26.You buy a notebook for ₹20 and a pen for ₹19. You pay with a ₹100 note. How much change do you get, in rupees?
27. 27.26 + 25 =
28. 28.55 − 29 =
29. 29.What is the remainder when 74 is divided by 5?
30. 30.66 × 4 =
31. 31.31 × 3 =
32. 32.Double 26 =
33. 33.You start your homework at 3:00 and finish at 5:35. How many minutes did you work?
34. 34.A train leaves at 3:30 and reaches the next city at 4:40. How many minutes is the journey?
35. 35.78 × 5 =
36. 36.15² =
37. 37.You start your homework at 6:40 and finish at 9:20. How many minutes did you work?
38. 38.Best estimate of 800 + 706? (a) 1300 (b) 1500 (c) 1700
39. 39.Best estimate of 280 + 126? (a) 600 (b) 200 (c) 400
40. 40.28 + 30 =

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