Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 855 · 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. 1.28² =
2. 2.88 − 63 =
3. 3.112 − 86 =
4. 4.41 × 9 =
5. 5.A film starts at 6:40 and ends at 8:10. How many minutes long is the film?
6. 6.61 children stand in rows of 6. How many full rows can they make?
7. 7.89 + ? = 100
8. 8.10 + 11 =
9. 9.27² =
10. 10.19 + 2 =
11. 11.8 + 7 =
12. 12.76 + 5 =
13. 13.19 + ? = 100
14. 14.21 + 22 =
15. 15.Best estimate of 614 + 554? (a) 1400 (b) 1200 (c) 1000
16. 16.38 laddoos are packed in boxes of 9. How many laddoos are left over?
17. 17.554 + 99 =
18. 18.6 + 7 =
19. 19.87 + 34 =
20. 20.55 + 27 =
21. 21.74 − 53 =
22. 22.Best estimate of 94 × 60? (a) 54000 (b) 5400 (c) 540
23. 23.You buy a box of crayons for ₹465 and pay with a ₹500 note. How much change do you get, in rupees?
24. 24.20 + 19 =
25. 25.42 + 36 =
26. 26.11 + 12 =
27. 27.You buy a box of crayons for ₹400 and pay with a ₹500 note. How much change do you get, in rupees?
28. 28.6 + 5 =
29. 29.209 − 99 =
30. 30.You buy a kite for ₹222 and pay with a ₹500 note. How much change do you get, in rupees?
31. 31.15 + 9 =
32. 32.71 + 15 =
33. 33.18² =
34. 34.A train leaves at 4:10 and reaches the next city at 6:10. How many minutes is the journey?
35. 35.18 + ? = 100
36. 36.A film starts at 7:55 and ends at 10:30. How many minutes long is the film?
37. 37.Best estimate of 445 + 181? (a) 800 (b) 400 (c) 600
38. 38.85 + 71 =
39. 39.8 + 9 =
40. 40.You buy a water bottle for ₹139 and pay with a ₹500 note. How much change do you get, in rupees?

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