Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 685 · 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. 2.48 + ? = 100
3. 3.325 − 298 =
4. 4.31 × 8 =
5. 5.Best estimate of 302 + 592? (a) 900 (b) 1100 (c) 700
6. 6.Best estimate of 129 + 752? (a) 700 (b) 1100 (c) 900
7. 7.51 × 6 =
8. 8.531 ÷ 9 =
9. 9.258 + 99 =
10. 10.Half of 32 =
11. 11.13² =
12. 12.53 × 4 =
13. 13.You buy a water bottle for ₹13 and a pen for ₹17. You pay with a ₹100 note. How much change do you get, in rupees?
14. 14.63 − 18 =
15. 15.A film starts at 1:45 and ends at 2:30. How many minutes long is the film?
16. 16.25 + 9 =
17. 17.96 ÷ 4 =
18. 18.34 × 4 =
19. 19.Half of 110 =
20. 20.56 + ? = 100
21. 21.10% of ₹580 =
22. 22.75 + 9 =
23. 23.30 − 19 =
24. 24.22² =
25. 25.25% of ₹890 =
26. 26.23 + 66 =
27. 27.A train leaves at 8:40 and reaches the next city at 11:30. How many minutes is the journey?
28. 28.Best estimate of 56 × 80? (a) 4800 (b) 480 (c) 48000
29. 29.152 ÷ 8 =
30. 30.You buy a notebook for ₹43 and a pen for ₹26. You pay with a ₹100 note. How much change do you get, in rupees?
31. 31.124 ÷ 4 =
32. 32.You buy a notebook for ₹419 and pay with a ₹500 note. How much change do you get, in rupees?
33. 33.34 + ? = 100
34. 34.527 − 497 =
35. 35.69 + ? = 100
36. 36.17 + 9 =
37. 37.288 ÷ 6 =
38. 38.A train leaves at 4:15 and reaches the next city at 5:40. How many minutes is the journey?
39. 39.120 − 96 =
40. 40.30 + 32 =

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