Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 458 · 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. 1.33 × 4 =
2. 2.83 × 5 =
3. 3.Best estimate of 91 × 39? (a) 360 (b) 3600 (c) 36000
4. 4.12 + 11 =
5. 5.306 ÷ 6 =
6. 6.Half of 104 =
7. 7.73 + 29 =
8. 8.Best estimate of 185 + 213? (a) 400 (b) 600 (c) 200
9. 9.327 − 294 =
10. 10.86 laddoos are packed in boxes of 7. How many laddoos are left over?
11. 11.74 × 4 =
12. 12.You buy a kite for ₹11 and a pen for ₹19. You pay with a ₹100 note. How much change do you get, in rupees?
13. 13.3 + ? = 10
14. 14.680 ÷ 8 =
15. 15.34 + 59 =
16. 16.188 ÷ 4 =
17. 17.664 + 99 =
18. 18.Double 73 =
19. 19.79 laddoos are packed in boxes of 6. How many laddoos are left over?
20. 20.A film starts at 1:30 and ends at 3:35. How many minutes long is the film?
21. 21.17 + 18 =
22. 22.24 + 26 =
23. 23.12² =
24. 24.9 + 10 =
25. 25.A cricket match starts at 1:55 and the first innings ends at 3:05. How many minutes did the innings last?
26. 26.50 + 19 =
27. 27.5 + ? = 10
28. 28.568 ÷ 8 =
29. 29.Best estimate of 778 + 208? (a) 1200 (b) 800 (c) 1000
30. 30.16 × 4 =
31. 31.47 + 31 =
32. 32.207 ÷ 9 =
33. 33.95 − 29 =
34. 34.Double 74 =
35. 35.Best estimate of 154 + 272? (a) 300 (b) 700 (c) 500
36. 36.1 + ? = 10
37. 37.Best estimate of 785 + 578? (a) 1200 (b) 1400 (c) 1600
38. 38.78 + 9 =
39. 39.You start your homework at 7:20 and finish at 8:15. How many minutes did you work?
40. 40.69 × 7 =

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