Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 302 · 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. 1.62 + 23 =
2. 2.Half of 34 =
3. 3.Half of 162 =
4. 4.10% of ₹170 =
5. 5.1 + ? = 10
6. 6.Best estimate of 713 + 675? (a) 1200 (b) 1400 (c) 1600
7. 7.You buy a cricket ball for ₹31 and pay with a ₹100 note. How much change do you get, in rupees?
8. 8.320 ÷ 8 =
9. 9.81 + 18 =
10. 10.68 + 6 =
11. 11.330 − 288 =
12. 12.17 + 5 =
13. 13.192 ÷ 8 =
14. 14.212 ÷ 4 =
15. 15.13 + ? = 100
16. 16.206 − 198 =
17. 17.17 + ? = 100
18. 18.33 × 3 =
19. 19.25% of ₹230 =
20. 20.68 laddoos are packed in boxes of 6. How many laddoos are left over?
21. 21.Best estimate of 78 × 14? (a) 8000 (b) 800 (c) 80
22. 22.A train leaves at 4:00 and reaches the next city at 5:40. How many minutes is the journey?
23. 23.You buy a pencil box for ₹60 and pay with a ₹100 note. How much change do you get, in rupees?
24. 24.25 × 5 =
25. 25.29 × 8 =
26. 26.A train leaves at 4:10 and reaches the next city at 6:05. How many minutes is the journey?
27. 27.You buy a kite for ₹457 and pay with a ₹500 note. How much change do you get, in rupees?
28. 28.Best estimate of 867 + 133? (a) 1200 (b) 1000 (c) 800
29. 29.50% of ₹690 =
30. 30.39 + 19 =
31. 31.You start your homework at 3:30 and finish at 4:40. How many minutes did you work?
32. 32.A train leaves at 6:30 and reaches the next city at 7:25. How many minutes is the journey?
33. 33.56 − 21 =
34. 34.Best estimate of 44 × 42? (a) 1600 (b) 160 (c) 16000
35. 35.18 × 9 =
36. 36.22 + ? = 100
37. 37.14² =
38. 38.What is the remainder when 21 is divided by 4?
39. 39.35 × 5 =
40. 40.79 + 26 =

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