Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 681 · 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. 1.75 + 7 =
2. 2.1 + ? = 10
3. 3.62 − 49 =
4. 4.26 + 21 =
5. 5.56 + 6 =
6. 6.184 ÷ 4 =
7. 7.15² =
8. 8.Best estimate of 90 × 76? (a) 7200 (b) 72000 (c) 720
9. 9.14 + 16 =
10. 10.19² =
11. 11.Half of 58 =
12. 12.Half of 144 =
13. 13.59 laddoos are packed in boxes of 9. How many laddoos are left over?
14. 14.168 + 99 =
15. 15.A cricket match starts at 8:45 and the first innings ends at 10:55. How many minutes did the innings last?
16. 16.120 ÷ 4 =
17. 17.A cricket match starts at 8:20 and the first innings ends at 10:20. How many minutes did the innings last?
18. 18.35 × 8 =
19. 19.10% of ₹250 =
20. 20.120 ÷ 8 =
21. 21.112 ÷ 4 =
22. 22.You buy a bag of mangoes for ₹45 and a pen for ₹19. You pay with a ₹100 note. How much change do you get, in rupees?
23. 23.208 ÷ 4 =
24. 24.68 + ? = 100
25. 25.107 − 29 =
26. 26.58 + 3 =
27. 27.62 + 66 =
28. 28.136 ÷ 4 =
29. 29.A cricket match starts at 5:00 and the first innings ends at 7:35. How many minutes did the innings last?
30. 30.86 + 5 =
31. 31.50% of ₹830 =
32. 32.40 × 4 =
33. 33.8 + 10 =
34. 34.9 + 10 =
35. 35.34 × 8 =
36. 36.13 + 15 =
37. 37.29 + 31 =
38. 38.You buy a water bottle for ₹73 and pay with a ₹100 note. How much change do you get, in rupees?
39. 39.29 + 46 =
40. 40.10% of ₹80 =

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