Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 419 · 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. 1.55 − 45 =
2. 2.54 ÷ 3 =
3. 3.You buy a storybook for ₹93 and pay with a ₹100 note. How much change do you get, in rupees?
4. 4.7 + 9 =
5. 5.You buy a storybook for ₹37 and a pen for ₹34. You pay with a ₹100 note. How much change do you get, in rupees?
6. 6.48 + 27 =
7. 7.9 + 9 =
8. 8.13² =
9. 9.84 − 25 =
10. 10.87 + 8 =
11. 11.25 + 9 =
12. 12.What is the remainder when 26 is divided by 3?
13. 13.25 + 68 =
14. 14.You buy a box of crayons for ₹86 and pay with a ₹100 note. How much change do you get, in rupees?
15. 15.81 − 63 =
16. 16.48 + 6 =
17. 17.81 × 7 =
18. 18.25 × 5 =
19. 19.99 − 68 =
20. 20.59 + ? = 100
21. 21.52 − 39 =
22. 22.48 ÷ 4 =
23. 23.81 children stand in rows of 7. How many full rows can they make?
24. 24.Best estimate of 54 × 24? (a) 100 (b) 1000 (c) 10000
25. 25.A cricket match starts at 6:40 and the first innings ends at 9:20. How many minutes did the innings last?
26. 26.23 + 22 =
27. 27.91 × 4 =
28. 28.79 + 6 =
29. 29.88 + ? = 100
30. 30.79 − 9 =
31. 31.83 − 15 =
32. 32.568 + 99 =
33. 33.Best estimate of 34 × 37? (a) 120 (b) 1200 (c) 12000
34. 34.57 + 8 =
35. 35.Half of 74 =
36. 36.25% of ₹40 =
37. 37.25² =
38. 38.85 − 61 =
39. 39.63 − 15 =
40. 40.28 + 51 =

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