Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 99 · 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. 1.240 ÷ 8 =
2. 2.17 + 9 =
3. 3.35 laddoos are packed in boxes of 3. How many laddoos are left over?
4. 4.53 − 19 =
5. 5.You buy a kite for ₹23 and a pen for ₹45. You pay with a ₹100 note. How much change do you get, in rupees?
6. 6.You start your homework at 3:20 and finish at 4:35. How many minutes did you work?
7. 7.33 + ? = 100
8. 8.24² =
9. 9.You start your homework at 5:35 and finish at 8:25. How many minutes did you work?
10. 10.75 − 22 =
11. 11.Best estimate of 265 + 149? (a) 400 (b) 600 (c) 200
12. 12.Half of 172 =
13. 13.37 + 6 =
14. 14.5% of ₹740 =
15. 15.57 + 7 =
16. 16.40 + ? = 100
17. 17.Best estimate of 690 + 304? (a) 1000 (b) 1200 (c) 800
18. 18.44 × 7 =
19. 19.68 + 81 =
20. 20.25% of ₹80 =
21. 21.Double 51 =
22. 22.164 ÷ 4 =
23. 23.68 − 48 =
24. 24.380 ÷ 4 =
25. 25.58 − 28 =
26. 26.A cricket match starts at 5:25 and the first innings ends at 8:20. How many minutes did the innings last?
27. 27.What is the remainder when 19 is divided by 4?
28. 28.11 + 10 =
29. 29.24 × 8 =
30. 30.6 + ? = 10
31. 31.You buy a water bottle for ₹57 and pay with a ₹100 note. How much change do you get, in rupees?
32. 32.72 − 43 =
33. 33.74 − 52 =
34. 34.414 ÷ 6 =
35. 35.17 × 8 =
36. 36.16 × 4 =
37. 37.Best estimate of 875 + 240? (a) 900 (b) 1100 (c) 1300
38. 38.A cricket match starts at 4:50 and the first innings ends at 6:00. How many minutes did the innings last?
39. 39.100 ÷ 4 =
40. 40.Double 33 =

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