Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 950 · 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 421 + 164? (a) 400 (b) 600 (c) 800
2. 2.Best estimate of 22 × 21? (a) 400 (b) 40 (c) 4000
3. 3.28 + 6 =
4. 4.A train leaves at 4:55 and reaches the next city at 5:50. How many minutes is the journey?
5. 5.5% of ₹860 =
6. 6.59 children stand in rows of 4. How many full rows can they make?
7. 7.A film starts at 5:20 and ends at 7:10. How many minutes long is the film?
8. 8.92 ÷ 4 =
9. 9.25% of ₹550 =
10. 10.8 + ? = 10
11. 11.152 ÷ 8 =
12. 12.Best estimate of 36 × 93? (a) 36000 (b) 360 (c) 3600
13. 13.83 − 19 =
14. 14.What is the remainder when 46 is divided by 3?
15. 15.40 + 56 =
16. 16.62 − 21 =
17. 17.33 × 6 =
18. 18.49 + 8 =
19. 19.93 × 9 =
20. 20.27 + 26 =
21. 21.486 ÷ 6 =
22. 22.9 + 6 =
23. 23.287 + 99 =
24. 24.Half of 148 =
25. 25.101 laddoos are packed in boxes of 8. How many laddoos are left over?
26. 26.17 × 4 =
27. 27.784 ÷ 8 =
28. 28.33 + ? = 100
29. 29.You buy a storybook for ₹33 and pay with a ₹100 note. How much change do you get, in rupees?
30. 30.6 + 7 =
31. 31.Best estimate of 19 × 13? (a) 2000 (b) 200 (c) 20
32. 32.46 × 7 =
33. 33.36 ÷ 3 =
34. 34.421 + 99 =
35. 35.188 ÷ 4 =
36. 36.25 × 4 =
37. 37.Best estimate of 21 × 73? (a) 14000 (b) 140 (c) 1400
38. 38.15 + 14 =
39. 39.32 + ? = 100
40. 40.332 ÷ 4 =

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