Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 206 · 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. 1.24 + 23 =
2. 2.43 + 35 =
3. 3.10% of ₹260 =
4. 4.36 × 8 =
5. 5.25 × 8 =
6. 6.You buy a box of crayons for ₹18 and pay with a ₹100 note. How much change do you get, in rupees?
7. 7.288 ÷ 8 =
8. 8.21 × 5 =
9. 9.5% of ₹70 =
10. 10.66 + 9 =
11. 11.Half of 84 =
12. 12.71 × 9 =
13. 13.74 − 51 =
14. 14.Best estimate of 737 + 553? (a) 1100 (b) 1300 (c) 1500
15. 15.15 + 14 =
16. 16.105 ÷ 5 =
17. 17.47 laddoos are packed in boxes of 3. How many laddoos are left over?
18. 18.71 − 58 =
19. 19.208 ÷ 4 =
20. 20.Best estimate of 51 × 71? (a) 350 (b) 35000 (c) 3500
21. 21.20 + 22 =
22. 22.62 − 45 =
23. 23.A cricket match starts at 2:50 and the first innings ends at 5:45. How many minutes did the innings last?
24. 24.Double 35 =
25. 25.You buy a kite for ₹216 and pay with a ₹500 note. How much change do you get, in rupees?
26. 26.Double 66 =
27. 27.A film starts at 2:05 and ends at 3:00. How many minutes long is the film?
28. 28.50 + 9 =
29. 29.8 + 9 =
30. 30.20 + 21 =
31. 31.Double 63 =
32. 32.70 − 31 =
33. 33.80 + 29 =
34. 34.6 + 8 =
35. 35.89 − 75 =
36. 36.27 × 3 =
37. 37.Best estimate of 17 × 86? (a) 1800 (b) 180 (c) 18000
38. 38.23 + 24 =
39. 39.46 × 4 =
40. 40.A train leaves at 1:40 and reaches the next city at 3:40. How many minutes is the journey?

Free mental maths lessons, practice and worksheets at talentjr.in/mental-maths