Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 571 · 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 68 × 72? (a) 490 (b) 4900 (c) 49000
2. 2.55 − 19 =
3. 3.10% of ₹900 =
4. 4.You buy a kite for ₹26 and a pen for ₹40. You pay with a ₹100 note. How much change do you get, in rupees?
5. 5.56 + 31 =
6. 6.20 × 4 =
7. 7.58 − 34 =
8. 8.33 + ? = 100
9. 9.25 × 4 =
10. 10.Best estimate of 76 × 94? (a) 72000 (b) 720 (c) 7200
11. 11.95 − 85 =
12. 12.54 + 19 =
13. 13.11 + 12 =
14. 14.435 ÷ 5 =
15. 15.92 − 61 =
16. 16.You buy a storybook for ₹62 and pay with a ₹100 note. How much change do you get, in rupees?
17. 17.75 + ? = 100
18. 18.110 − 89 =
19. 19.You buy a box of crayons for ₹37 and a pen for ₹21. You pay with a ₹100 note. How much change do you get, in rupees?
20. 20.Best estimate of 654 + 598? (a) 1100 (b) 1500 (c) 1300
21. 21.Best estimate of 779 + 215? (a) 1200 (b) 1000 (c) 800
22. 22.58 + 3 =
23. 23.10 + 9 =
24. 24.132 ÷ 4 =
25. 25.A cricket match starts at 2:45 and the first innings ends at 5:40. How many minutes did the innings last?
26. 26.24 + 61 =
27. 27.66 + ? = 100
28. 28.30 + 31 =
29. 29.Best estimate of 580 + 265? (a) 1100 (b) 700 (c) 900
30. 30.284 ÷ 4 =
31. 31.13 − 9 =
32. 32.50% of ₹550 =
33. 33.53 − 36 =
34. 34.23 + 22 =
35. 35.What is the remainder when 19 is divided by 3?
36. 36.Double 77 =
37. 37.You buy a pencil box for ₹277 and pay with a ₹500 note. How much change do you get, in rupees?
38. 38.What is the remainder when 17 is divided by 3?
39. 39.124 children stand in rows of 9. How many full rows can they make?
40. 40.66 × 5 =

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