Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 487 · 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. 1.23 + 62 =
2. 2.Best estimate of 222 + 766? (a) 1000 (b) 1200 (c) 800
3. 3.189 ÷ 9 =
4. 4.You buy a notebook for ₹369 and pay with a ₹500 note. How much change do you get, in rupees?
5. 5.25% of ₹100 =
6. 6.3 + ? = 10
7. 7.63 + 87 =
8. 8.66 − 49 =
9. 9.87 children stand in rows of 6. How many full rows can they make?
10. 10.You buy a kite for ₹218 and pay with a ₹500 note. How much change do you get, in rupees?
11. 11.108 children stand in rows of 7. How many full rows can they make?
12. 12.85 − 31 =
13. 13.100 ÷ 4 =
14. 14.14 + 15 =
15. 15.75 × 7 =
16. 16.21 × 8 =
17. 17.19² =
18. 18.You buy a notebook for ₹473 and pay with a ₹500 note. How much change do you get, in rupees?
19. 19.You start your homework at 3:50 and finish at 5:30. How many minutes did you work?
20. 20.82 − 29 =
21. 21.5% of ₹120 =
22. 22.Half of 148 =
23. 23.56 − 17 =
24. 24.19 × 4 =
25. 25.13 + 12 =
26. 26.6 + ? = 10
27. 27.50% of ₹520 =
28. 28.163 − 99 =
29. 29.41 − 29 =
30. 30.56 + 49 =
31. 31.13² =
32. 32.35 + ? = 100
33. 33.Best estimate of 60 × 54? (a) 3000 (b) 30000 (c) 300
34. 34.69 × 4 =
35. 35.91 − 61 =
36. 36.6 + 7 =
37. 37.56 − 29 =
38. 38.Double 66 =
39. 39.93 ÷ 3 =
40. 40.176 ÷ 8 =

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