Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 977 · 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. 1.67 − 29 =
2. 2.82 + ? = 100
3. 3.517 − 484 =
4. 4.49 + 3 =
5. 5.You buy a pencil box for ₹31 and pay with a ₹100 note. How much change do you get, in rupees?
6. 6.You buy a notebook for ₹38 and a pen for ₹21. You pay with a ₹100 note. How much change do you get, in rupees?
7. 7.24 + 25 =
8. 8.12 + 14 =
9. 9.87 − 78 =
10. 10.55 × 4 =
11. 11.20 + 22 =
12. 12.You buy a cricket ball for ₹30 and a pen for ₹34. You pay with a ₹100 note. How much change do you get, in rupees?
13. 13.A cricket match starts at 2:30 and the first innings ends at 3:30. How many minutes did the innings last?
14. 14.116 ÷ 4 =
15. 15.39 + 3 =
16. 16.45 − 9 =
17. 17.70 − 29 =
18. 18.13 × 7 =
19. 19.16² =
20. 20.66 × 4 =
21. 21.86 + 7 =
22. 22.63 − 45 =
23. 23.Best estimate of 79 × 43? (a) 320 (b) 32000 (c) 3200
24. 24.61 + 29 =
25. 25.11² =
26. 26.68 ÷ 4 =
27. 27.75 ÷ 3 =
28. 28.You buy a cricket ball for ₹77 and pay with a ₹100 note. How much change do you get, in rupees?
29. 29.13² =
30. 30.You buy a pencil box for ₹29 and a pen for ₹28. You pay with a ₹100 note. How much change do you get, in rupees?
31. 31.18 + 19 =
32. 32.78 + ? = 100
33. 33.50% of ₹500 =
34. 34.58 − 23 =
35. 35.71 − 61 =
36. 36.50% of ₹750 =
37. 37.Best estimate of 430 + 782? (a) 1200 (b) 1000 (c) 1400
38. 38.22 × 8 =
39. 39.33 + 24 =
40. 40.48 × 4 =

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