Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 670 · 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.Half of 70 =
2. 2.61 laddoos are packed in boxes of 6. How many laddoos are left over?
3. 3.You buy a kite for ₹450 and pay with a ₹500 note. How much change do you get, in rupees?
4. 4.126 children stand in rows of 8. How many full rows can they make?
5. 5.35 + 6 =
6. 6.129 − 98 =
7. 7.41 × 8 =
8. 8.62 + 81 =
9. 9.58 − 37 =
10. 10.5% of ₹630 =
11. 11.27 + 5 =
12. 12.91 − 61 =
13. 13.110 − 75 =
14. 14.92 − 32 =
15. 15.11 + ? = 100
16. 16.82 − 33 =
17. 17.35 × 4 =
18. 18.50 + 16 =
19. 19.81 − 53 =
20. 20.Best estimate of 431 + 760? (a) 1200 (b) 1400 (c) 1000
21. 21.29 + 30 =
22. 22.You buy a box of crayons for ₹34 and a pen for ₹24. You pay with a ₹100 note. How much change do you get, in rupees?
23. 23.86 + 71 =
24. 24.34 + 19 =
25. 25.15² =
26. 26.A film starts at 4:50 and ends at 5:30. How many minutes long is the film?
27. 27.A film starts at 4:55 and ends at 7:10. How many minutes long is the film?
28. 28.A train leaves at 8:45 and reaches the next city at 9:30. How many minutes is the journey?
29. 29.14 + 19 =
30. 30.19 + 9 =
31. 31.21 + ? = 100
32. 32.79 + 2 =
33. 33.Half of 74 =
34. 34.85 + 6 =
35. 35.3 + ? = 10
36. 36.47 × 4 =
37. 37.You buy a box of crayons for ₹18 and pay with a ₹100 note. How much change do you get, in rupees?
38. 38.81 − 57 =
39. 39.6 + 7 =
40. 40.What is the remainder when 17 is divided by 3?

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