Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 524 · 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.You start your homework at 1:55 and finish at 2:30. How many minutes did you work?
2. 2.Half of 80 =
3. 3.Best estimate of 14 × 14? (a) 100 (b) 10 (c) 1000
4. 4.Best estimate of 83 × 12? (a) 8000 (b) 80 (c) 800
5. 5.29 + 28 =
6. 6.16 + 7 =
7. 7.864 ÷ 9 =
8. 8.70 − 38 =
9. 9.8 + 3 =
10. 10.52 − 36 =
11. 11.What is the remainder when 94 is divided by 6?
12. 12.184 ÷ 8 =
13. 13.99 − 62 =
14. 14.29 + 76 =
15. 15.18² =
16. 16.29 children stand in rows of 3. How many full rows can they make?
17. 17.71 − 18 =
18. 18.A film starts at 4:35 and ends at 5:10. How many minutes long is the film?
19. 19.84 − 14 =
20. 20.81 + 55 =
21. 21.A train leaves at 6:05 and reaches the next city at 8:00. How many minutes is the journey?
22. 22.6 + ? = 10
23. 23.56 + 8 =
24. 24.16 + 17 =
25. 25.61 − 37 =
26. 26.288 ÷ 8 =
27. 27.25% of ₹290 =
28. 28.Best estimate of 635 + 519? (a) 900 (b) 1300 (c) 1100
29. 29.You buy a kite for ₹31 and a pen for ₹14. You pay with a ₹100 note. How much change do you get, in rupees?
30. 30.534 − 99 =
31. 31.Best estimate of 638 + 309? (a) 900 (b) 700 (c) 1100
32. 32.23 − 9 =
33. 33.You buy a kite for ₹28 and pay with a ₹100 note. How much change do you get, in rupees?
34. 34.122 − 94 =
35. 35.74 − 29 =
36. 36.13² =
37. 37.A cricket match starts at 5:10 and the first innings ends at 6:15. How many minutes did the innings last?
38. 38.A train leaves at 6:40 and reaches the next city at 7:25. How many minutes is the journey?
39. 39.10 + 12 =
40. 40.16 children stand in rows of 3. How many full rows can they make?

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