Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 169 · 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 start your homework at 8:15 and finish at 10:25. How many minutes did you work?
2. 2.Double 37 =
3. 3.You buy a pencil box for ₹76 and pay with a ₹100 note. How much change do you get, in rupees?
4. 4.40 + 82 =
5. 5.521 − 476 =
6. 6.86 − 23 =
7. 7.65 × 7 =
8. 8.11 + 12 =
9. 9.Best estimate of 626 + 507? (a) 900 (b) 1300 (c) 1100
10. 10.45 − 9 =
11. 11.26 + 9 =
12. 12.95 − 35 =
13. 13.8 + 9 =
14. 14.Best estimate of 619 + 474? (a) 1300 (b) 900 (c) 1100
15. 15.89 − 19 =
16. 16.23 laddoos are packed in boxes of 5. How many laddoos are left over?
17. 17.514 − 488 =
18. 18.22 + 23 =
19. 19.38 × 4 =
20. 20.19 + ? = 100
21. 21.402 − 99 =
22. 22.59 + 3 =
23. 23.307 − 279 =
24. 24.25% of ₹270 =
25. 25.84 + 38 =
26. 26.112 − 92 =
27. 27.78 − 44 =
28. 28.A cricket match starts at 4:20 and the first innings ends at 7:40. How many minutes did the innings last?
29. 29.49 + 7 =
30. 30.120 ÷ 8 =
31. 31.59 + 8 =
32. 32.87 + 31 =
33. 33.628 − 99 =
34. 34.Best estimate of 56 × 13? (a) 6000 (b) 60 (c) 600
35. 35.25% of ₹450 =
36. 36.39 × 4 =
37. 37.Best estimate of 492 + 540? (a) 800 (b) 1000 (c) 1200
38. 38.25 + 6 =
39. 39.Best estimate of 674 + 658? (a) 1200 (b) 1600 (c) 1400
40. 40.10% of ₹40 =

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