Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 803 · 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. 1.736 + 99 =
2. 2.60 + 35 =
3. 3.You buy a water bottle for ₹92 and pay with a ₹100 note. How much change do you get, in rupees?
4. 4.62 + 44 =
5. 5.63 + 18 =
6. 6.105 ÷ 5 =
7. 7.Best estimate of 56 × 40? (a) 2400 (b) 24000 (c) 240
8. 8.1 + ? = 10
9. 9.76 + 29 =
10. 10.511 ÷ 7 =
11. 11.57 − 45 =
12. 12.517 − 479 =
13. 13.28 × 8 =
14. 14.304 ÷ 8 =
15. 15.342 ÷ 6 =
16. 16.264 ÷ 3 =
17. 17.You buy a box of crayons for ₹26 and pay with a ₹100 note. How much change do you get, in rupees?
18. 18.1013 − 988 =
19. 19.52 ÷ 4 =
20. 20.Double 36 =
21. 21.25 + 27 =
22. 22.53 − 47 =
23. 23.50% of ₹320 =
24. 24.1021 − 989 =
25. 25.48 + 8 =
26. 26.6 + 9 =
27. 27.32 + 29 =
28. 28.Best estimate of 193 + 223? (a) 200 (b) 600 (c) 400
29. 29.Best estimate of 734 + 807? (a) 1500 (b) 1300 (c) 1700
30. 30.110 − 77 =
31. 31.200 ÷ 8 =
32. 32.A train leaves at 4:30 and reaches the next city at 7:05. How many minutes is the journey?
33. 33.58 × 4 =
34. 34.Half of 46 =
35. 35.25 + 26 =
36. 36.23 + 22 =
37. 37.43 laddoos are packed in boxes of 7. How many laddoos are left over?
38. 38.79 + ? = 100
39. 39.89 + 7 =
40. 40.23 × 9 =

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