Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 91 · 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. 1.104 ÷ 8 =
2. 2.105 ÷ 5 =
3. 3.261 ÷ 9 =
4. 4.15 × 4 =
5. 5.27 + 4 =
6. 6.71 + 61 =
7. 7.51 + ? = 100
8. 8.531 ÷ 9 =
9. 9.21² =
10. 10.7 + ? = 10
11. 11.152 ÷ 8 =
12. 12.52 ÷ 4 =
13. 13.Best estimate of 61 × 22? (a) 1200 (b) 12000 (c) 120
14. 14.92 − 62 =
15. 15.366 ÷ 6 =
16. 16.Best estimate of 662 + 266? (a) 1000 (b) 800 (c) 1200
17. 17.3 + ? = 10
18. 18.16 + 8 =
19. 19.You buy a cricket ball for ₹226 and pay with a ₹500 note. How much change do you get, in rupees?
20. 20.5% of ₹560 =
21. 21.5% of ₹490 =
22. 22.10% of ₹550 =
23. 23.69 + 5 =
24. 24.11 + 12 =
25. 25.You buy a bag of mangoes for ₹110 and pay with a ₹500 note. How much change do you get, in rupees?
26. 26.25² =
27. 27.22² =
28. 28.68 − 23 =
29. 29.505 − 498 =
30. 30.18 + 6 =
31. 31.13 + 14 =
32. 32.30 − 9 =
33. 33.You buy a water bottle for ₹82 and pay with a ₹100 note. How much change do you get, in rupees?
34. 34.14 + 15 =
35. 35.6 + ? = 10
36. 36.What is the remainder when 36 is divided by 5?
37. 37.23 + 22 =
38. 38.29 + 31 =
39. 39.You buy a water bottle for ₹58 and pay with a ₹100 note. How much change do you get, in rupees?
40. 40.10% of ₹60 =

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