Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 312 · 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 338 + 435? (a) 700 (b) 500 (c) 900
2. 2.76 ÷ 4 =
3. 3.184 ÷ 4 =
4. 4.368 ÷ 4 =
5. 5.10% of ₹420 =
6. 6.38 × 8 =
7. 7.5% of ₹300 =
8. 8.65 − 35 =
9. 9.505 − 489 =
10. 10.19 + 9 =
11. 11.Best estimate of 782 + 753? (a) 1600 (b) 1400 (c) 1800
12. 12.71 + 49 =
13. 13.You buy a storybook for ₹84 and pay with a ₹100 note. How much change do you get, in rupees?
14. 14.762 − 99 =
15. 15.60 + 61 =
16. 16.Best estimate of 61 × 44? (a) 2400 (b) 24000 (c) 240
17. 17.23 + 22 =
18. 18.69 + 4 =
19. 19.100 ÷ 4 =
20. 20.180 ÷ 4 =
21. 21.You buy a notebook for ₹313 and pay with a ₹500 note. How much change do you get, in rupees?
22. 22.55 − 24 =
23. 23.56 + 36 =
24. 24.96 ÷ 6 =
25. 25.95 − 65 =
26. 26.40 children stand in rows of 9. How many full rows can they make?
27. 27.78 − 48 =
28. 28.A train leaves at 7:10 and reaches the next city at 8:40. How many minutes is the journey?
29. 29.10% of ₹240 =
30. 30.28² =
31. 31.63 × 7 =
32. 32.48 × 4 =
33. 33.93 − 82 =
34. 34.10% of ₹280 =
35. 35.208 ÷ 8 =
36. 36.35 + 9 =
37. 37.8 + ? = 10
38. 38.47 − 19 =
39. 39.138 ÷ 3 =
40. 40.220 ÷ 4 =

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