Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 220 · 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. 1.7 + 8 =
2. 2.136 ÷ 8 =
3. 3.69 − 51 =
4. 4.38 + 29 =
5. 5.66 − 15 =
6. 6.110 laddoos are packed in boxes of 7. How many laddoos are left over?
7. 7.105 ÷ 5 =
8. 8.Half of 170 =
9. 9.You buy a water bottle for ₹43 and a pen for ₹39. You pay with a ₹100 note. How much change do you get, in rupees?
10. 10.Best estimate of 440 + 171? (a) 600 (b) 400 (c) 800
11. 11.156 ÷ 4 =
12. 12.12² =
13. 13.46 × 3 =
14. 14.75 + ? = 100
15. 15.80 − 71 =
16. 16.Best estimate of 66 × 18? (a) 1400 (b) 14000 (c) 140
17. 17.19 + 29 =
18. 18.25% of ₹700 =
19. 19.25% of ₹870 =
20. 20.123 − 86 =
21. 21.23 + 24 =
22. 22.59 − 33 =
23. 23.What is the remainder when 43 is divided by 3?
24. 24.89 × 8 =
25. 25.9 + ? = 10
26. 26.258 ÷ 3 =
27. 27.19 + 9 =
28. 28.A film starts at 5:35 and ends at 6:35. How many minutes long is the film?
29. 29.1002 − 981 =
30. 30.92 − 75 =
31. 31.83 + 14 =
32. 32.26 laddoos are packed in boxes of 4. How many laddoos are left over?
33. 33.23 × 9 =
34. 34.Best estimate of 36 × 76? (a) 3200 (b) 32000 (c) 320
35. 35.24 + 29 =
36. 36.24 + 25 =
37. 37.54 × 6 =
38. 38.62 × 4 =
39. 39.21 + 61 =
40. 40.306 ÷ 6 =

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