Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 665 · 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. 1.10% of ₹780 =
2. 2.62 × 8 =
3. 3.Half of 70 =
4. 4.You start your homework at 4:40 and finish at 5:45. How many minutes did you work?
5. 5.Double 78 =
6. 6.50 + 27 =
7. 7.78 + 19 =
8. 8.55 − 29 =
9. 9.Best estimate of 16 × 77? (a) 16000 (b) 1600 (c) 160
10. 10.64 − 41 =
11. 11.41 × 8 =
12. 12.38 children stand in rows of 4. How many full rows can they make?
13. 13.28 × 8 =
14. 14.107 − 95 =
15. 15.10% of ₹140 =
16. 16.51 + ? = 100
17. 17.47 + 9 =
18. 18.21 + 22 =
19. 19.5% of ₹50 =
20. 20.47 + 4 =
21. 21.83 − 71 =
22. 22.Best estimate of 90 × 37? (a) 36000 (b) 360 (c) 3600
23. 23.A cricket match starts at 2:40 and the first innings ends at 3:45. How many minutes did the innings last?
24. 24.232 ÷ 4 =
25. 25.19² =
26. 26.14² =
27. 27.A train leaves at 8:50 and reaches the next city at 11:45. How many minutes is the journey?
28. 28.Double 46 =
29. 29.What is the remainder when 77 is divided by 9?
30. 30.95 children stand in rows of 7. How many full rows can they make?
31. 31.36 × 9 =
32. 32.15² =
33. 33.You start your homework at 3:45 and finish at 4:10. How many minutes did you work?
34. 34.99 − 17 =
35. 35.Double 81 =
36. 36.150 ÷ 6 =
37. 37.15 + 17 =
38. 38.Double 76 =
39. 39.35 + 7 =
40. 40.You buy a kite for ₹14 and a pen for ₹14. You pay with a ₹100 note. How much change do you get, in rupees?

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