Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 886 · 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.Best estimate of 17 × 36? (a) 8000 (b) 800 (c) 80
2. 2.56 − 14 =
3. 3.63 + ? = 100
4. 4.25% of ₹610 =
5. 5.A train leaves at 3:55 and reaches the next city at 6:55. How many minutes is the journey?
6. 6.33 × 6 =
7. 7.Double 43 =
8. 8.A train leaves at 4:05 and reaches the next city at 6:20. How many minutes is the journey?
9. 9.Half of 110 =
10. 10.45 + 9 =
11. 11.205 − 176 =
12. 12.82 − 64 =
13. 13.21 + 32 =
14. 14.60 + 29 =
15. 15.77 − 18 =
16. 16.74 children stand in rows of 5. How many full rows can they make?
17. 17.13² =
18. 18.What is the remainder when 29 is divided by 3?
19. 19.30 + 29 =
20. 20.Best estimate of 587 + 481? (a) 1100 (b) 900 (c) 1300
21. 21.You buy a kite for ₹26 and a pen for ₹42. You pay with a ₹100 note. How much change do you get, in rupees?
22. 22.24 + 23 =
23. 23.172 ÷ 4 =
24. 24.14 laddoos are packed in boxes of 3. How many laddoos are left over?
25. 25.93 children stand in rows of 6. How many full rows can they make?
26. 26.57 − 29 =
27. 27.Best estimate of 14 × 24? (a) 2000 (b) 20 (c) 200
28. 28.32 + 68 =
29. 29.11² =
30. 30.Best estimate of 428 + 596? (a) 1200 (b) 1000 (c) 800
31. 31.58 + 29 =
32. 32.9 + 7 =
33. 33.You start your homework at 8:55 and finish at 10:10. How many minutes did you work?
34. 34.A cricket match starts at 4:05 and the first innings ends at 6:20. How many minutes did the innings last?
35. 35.34 × 5 =
36. 36.Best estimate of 54 × 62? (a) 30000 (b) 3000 (c) 300
37. 37.70 − 29 =
38. 38.38 + 73 =
39. 39.93 ÷ 3 =
40. 40.1002 − 997 =

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