Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 26 · 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. 1.3 + ? = 10
2. 2.Best estimate of 12 × 26? (a) 30 (b) 300 (c) 3000
3. 3.27 × 8 =
4. 4.66 − 48 =
5. 5.9 + 8 =
6. 6.88 − 71 =
7. 7.24² =
8. 8.8 + 3 =
9. 9.Best estimate of 58 × 87? (a) 540 (b) 5400 (c) 54000
10. 10.26 + 25 =
11. 11.1015 − 995 =
12. 12.17 + 19 =
13. 13.89 − 67 =
14. 14.72 − 19 =
15. 15.You buy a kite for ₹406 and pay with a ₹500 note. How much change do you get, in rupees?
16. 16.76 − 40 =
17. 17.84 + 43 =
18. 18.224 ÷ 8 =
19. 19.31 + 23 =
20. 20.27 + 44 =
21. 21.Best estimate of 666 + 695? (a) 1400 (b) 1200 (c) 1600
22. 22.11 + 13 =
23. 23.A cricket match starts at 6:55 and the first innings ends at 8:40. How many minutes did the innings last?
24. 24.Best estimate of 386 + 253? (a) 700 (b) 900 (c) 500
25. 25.27² =
26. 26.234 + 99 =
27. 27.80 − 45 =
28. 28.78 × 9 =
29. 29.67 + 39 =
30. 30.58 + 21 =
31. 31.What is the remainder when 77 is divided by 9?
32. 32.25% of ₹510 =
33. 33.65 × 4 =
34. 34.57 + 4 =
35. 35.6 + ? = 10
36. 36.19 laddoos are packed in boxes of 3. How many laddoos are left over?
37. 37.108 − 62 =
38. 38.What is the remainder when 73 is divided by 9?
39. 39.204 + 99 =
40. 40.10% of ₹360 =

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