Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 545 · 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. 1.20 + 21 =
2. 2.2 + ? = 10
3. 3.5% of ₹140 =
4. 4.Best estimate of 510 + 751? (a) 1300 (b) 1100 (c) 1500
5. 5.45 + 7 =
6. 6.8 + ? = 10
7. 7.57 − 42 =
8. 8.65 + 89 =
9. 9.27 + 77 =
10. 10.89 children stand in rows of 7. How many full rows can they make?
11. 11.25% of ₹80 =
12. 12.36 + ? = 100
13. 13.74 + 9 =
14. 14.21² =
15. 15.8 + 9 =
16. 16.86 − 9 =
17. 17.50% of ₹330 =
18. 18.5% of ₹520 =
19. 19.24 + ? = 100
20. 20.173 − 99 =
21. 21.You start your homework at 2:40 and finish at 4:55. How many minutes did you work?
22. 22.184 ÷ 8 =
23. 23.A train leaves at 7:45 and reaches the next city at 8:35. How many minutes is the journey?
24. 24.59 × 4 =
25. 25.5 + ? = 10
26. 26.15 + 7 =
27. 27.48 children stand in rows of 5. How many full rows can they make?
28. 28.29 + 65 =
29. 29.79 + 7 =
30. 30.You buy a cricket ball for ₹74 and pay with a ₹100 note. How much change do you get, in rupees?
31. 31.You buy a pencil box for ₹24 and a pen for ₹41. You pay with a ₹100 note. How much change do you get, in rupees?
32. 32.64 − 45 =
33. 33.A cricket match starts at 2:10 and the first innings ends at 3:05. How many minutes did the innings last?
34. 34.159 − 99 =
35. 35.6 + 8 =
36. 36.53 − 24 =
37. 37.16 + 8 =
38. 38.58 + 29 =
39. 39.56 − 29 =
40. 40.16² =

Free mental maths lessons, practice and worksheets at talentjr.in/mental-maths