Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 1 · 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. 1.523 − 479 =
2. 2.76 ÷ 4 =
3. 3.222 − 187 =
4. 4.25² =
5. 5.Best estimate of 81 × 76? (a) 6400 (b) 640 (c) 64000
6. 6.85 + 9 =
7. 7.27² =
8. 8.What is the remainder when 66 is divided by 5?
9. 9.9 + 10 =
10. 10.9 + 8 =
11. 11.111 ÷ 3 =
12. 12.62 − 39 =
13. 13.2 + ? = 10
14. 14.25% of ₹890 =
15. 15.62 − 35 =
16. 16.48 − 29 =
17. 17.Best estimate of 305 + 421? (a) 500 (b) 900 (c) 700
18. 18.You buy a cricket ball for ₹11 and a pen for ₹29. You pay with a ₹100 note. How much change do you get, in rupees?
19. 19.501 − 498 =
20. 20.35 × 4 =
21. 21.Double 51 =
22. 22.Half of 50 =
23. 23.Half of 190 =
24. 24.What is the remainder when 54 is divided by 5?
25. 25.503 − 492 =
26. 26.45 × 3 =
27. 27.218 − 195 =
28. 28.3 + ? = 10
29. 29.61 − 26 =
30. 30.What is the remainder when 47 is divided by 9?
31. 31.A cricket match starts at 8:05 and the first innings ends at 11:10. How many minutes did the innings last?
32. 32.32 + 43 =
33. 33.96 ÷ 8 =
34. 34.101 − 59 =
35. 35.Half of 38 =
36. 36.55 × 4 =
37. 37.Best estimate of 69 × 52? (a) 350 (b) 3500 (c) 35000
38. 38.52 ÷ 4 =
39. 39.53 − 38 =
40. 40.144 ÷ 9 =

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