Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 594 · 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. 1.13 × 8 =
2. 2.97 − 33 =
3. 3.27 × 9 =
4. 4.3 + ? = 10
5. 5.Best estimate of 16 × 54? (a) 10000 (b) 1000 (c) 100
6. 6.236 ÷ 4 =
7. 7.Best estimate of 66 × 48? (a) 350 (b) 3500 (c) 35000
8. 8.23 − 9 =
9. 9.60 + 31 =
10. 10.184 ÷ 4 =
11. 11.98 × 4 =
12. 12.30 + 31 =
13. 13.Best estimate of 124 + 754? (a) 700 (b) 900 (c) 1100
14. 14.You buy a notebook for ₹83 and pay with a ₹100 note. How much change do you get, in rupees?
15. 15.58 − 48 =
16. 16.108 − 86 =
17. 17.Double 33 =
18. 18.26 + 27 =
19. 19.Half of 62 =
20. 20.51 + 18 =
21. 21.A cricket match starts at 1:00 and the first innings ends at 2:00. How many minutes did the innings last?
22. 22.70 + ? = 100
23. 23.You buy a kite for ₹53 and pay with a ₹100 note. How much change do you get, in rupees?
24. 24.35 + 49 =
25. 25.Half of 98 =
26. 26.21² =
27. 27.Double 49 =
28. 28.Double 81 =
29. 29.A film starts at 6:15 and ends at 8:40. How many minutes long is the film?
30. 30.64 + 49 =
31. 31.26 + 29 =
32. 32.You buy a box of crayons for ₹29 and a pen for ₹17. You pay with a ₹100 note. How much change do you get, in rupees?
33. 33.26 + 5 =
34. 34.You start your homework at 7:05 and finish at 7:55. How many minutes did you work?
35. 35.You start your homework at 3:45 and finish at 6:00. How many minutes did you work?
36. 36.294 ÷ 3 =
37. 37.27 × 8 =
38. 38.You start your homework at 1:45 and finish at 2:45. How many minutes did you work?
39. 39.25 × 9 =
40. 40.A cricket match starts at 3:40 and the first innings ends at 6:25. How many minutes did the innings last?

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