Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 470 · 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. 1.40 + ? = 100
2. 2.67 − 32 =
3. 3.200 ÷ 8 =
4. 4.23² =
5. 5.61 laddoos are packed in boxes of 7. How many laddoos are left over?
6. 6.90 − 19 =
7. 7.Best estimate of 172 + 303? (a) 700 (b) 300 (c) 500
8. 8.What is the remainder when 34 is divided by 5?
9. 9.1018 − 995 =
10. 10.24 + 25 =
11. 11.Best estimate of 515 + 791? (a) 1300 (b) 1100 (c) 1500
12. 12.13 + ? = 100
13. 13.32 × 8 =
14. 14.45 + 8 =
15. 15.33 + 48 =
16. 16.82 + 61 =
17. 17.500 − 99 =
18. 18.55 + 8 =
19. 19.71 × 4 =
20. 20.53 − 9 =
21. 21.17² =
22. 22.52 − 36 =
23. 23.79 − 27 =
24. 24.Best estimate of 681 + 628? (a) 1300 (b) 1100 (c) 1500
25. 25.67 × 4 =
26. 26.33 × 4 =
27. 27.113 children stand in rows of 8. How many full rows can they make?
28. 28.13² =
29. 29.15 + 14 =
30. 30.46 laddoos are packed in boxes of 3. How many laddoos are left over?
31. 31.You start your homework at 3:25 and finish at 5:55. How many minutes did you work?
32. 32.59 − 38 =
33. 33.29 × 6 =
34. 34.240 ÷ 5 =
35. 35.You buy a kite for ₹31 and pay with a ₹100 note. How much change do you get, in rupees?
36. 36.205 − 184 =
37. 37.35 + 6 =
38. 38.Best estimate of 22 × 90? (a) 18000 (b) 180 (c) 1800
39. 39.21 × 4 =
40. 40.28 + 3 =

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