Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 731 · 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. 1.490 ÷ 5 =
2. 2.8 + 7 =
3. 3.1007 − 987 =
4. 4.203 − 191 =
5. 5.68 − 31 =
6. 6.9 + ? = 10
7. 7.226 − 178 =
8. 8.58 × 3 =
9. 9.5 + 8 =
10. 10.37 + 9 =
11. 11.Best estimate of 166 + 543? (a) 500 (b) 700 (c) 900
12. 12.55 − 25 =
13. 13.12 × 4 =
14. 14.33 × 8 =
15. 15.Best estimate of 199 + 764? (a) 1000 (b) 800 (c) 1200
16. 16.92 − 75 =
17. 17.69 × 4 =
18. 18.22 + 63 =
19. 19.You buy a box of crayons for ₹241 and pay with a ₹500 note. How much change do you get, in rupees?
20. 20.304 ÷ 8 =
21. 21.64 − 54 =
22. 22.21 × 4 =
23. 23.Half of 54 =
24. 24.36 children stand in rows of 8. How many full rows can they make?
25. 25.63 − 49 =
26. 26.66 + ? = 100
27. 27.49 − 9 =
28. 28.35 + 36 =
29. 29.16 + 17 =
30. 30.8 + 8 =
31. 31.You buy a notebook for ₹49 and pay with a ₹100 note. How much change do you get, in rupees?
32. 32.152 − 99 =
33. 33.18 + ? = 100
34. 34.A cricket match starts at 3:00 and the first innings ends at 3:25. How many minutes did the innings last?
35. 35.18² =
36. 36.3 + ? = 10
37. 37.19 × 8 =
38. 38.A train leaves at 6:30 and reaches the next city at 9:00. How many minutes is the journey?
39. 39.29 + 19 =
40. 40.94 − 59 =

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