Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 248 · 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.You buy a notebook for ₹26 and a pen for ₹26. You pay with a ₹100 note. How much change do you get, in rupees?
2. 2.158 + 99 =
3. 3.200 ÷ 8 =
4. 4.27 × 8 =
5. 5.5% of ₹600 =
6. 6.You buy a box of crayons for ₹31 and a pen for ₹42. You pay with a ₹100 note. How much change do you get, in rupees?
7. 7.12² =
8. 8.304 ÷ 8 =
9. 9.12 × 4 =
10. 10.17 + 7 =
11. 11.545 + 99 =
12. 12.1 + ? = 10
13. 13.65 + 9 =
14. 14.40 + 78 =
15. 15.77 − 44 =
16. 16.27 + ? = 100
17. 17.Half of 56 =
18. 18.17 × 8 =
19. 19.27 + 9 =
20. 20.26 + 25 =
21. 21.A cricket match starts at 1:55 and the first innings ends at 2:50. How many minutes did the innings last?
22. 22.71 − 21 =
23. 23.60 − 46 =
24. 24.22 + ? = 100
25. 25.63 − 46 =
26. 26.Best estimate of 51 × 39? (a) 2000 (b) 20000 (c) 200
27. 27.You buy a bag of mangoes for ₹45 and pay with a ₹100 note. How much change do you get, in rupees?
28. 28.You start your homework at 8:30 and finish at 11:35. How many minutes did you work?
29. 29.You start your homework at 3:05 and finish at 4:10. How many minutes did you work?
30. 30.37 + 5 =
31. 31.You start your homework at 3:05 and finish at 5:45. How many minutes did you work?
32. 32.27 + 19 =
33. 33.67 laddoos are packed in boxes of 9. How many laddoos are left over?
34. 34.11² =
35. 35.86 + 7 =
36. 36.13 × 3 =
37. 37.104 ÷ 4 =
38. 38.50% of ₹180 =
39. 39.You buy a kite for ₹22 and a pen for ₹31. You pay with a ₹100 note. How much change do you get, in rupees?
40. 40.306 − 298 =

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