Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 174 · 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. 1.5 + ? = 10
2. 2.21 + 20 =
3. 3.39 − 29 =
4. 4.16 × 3 =
5. 5.You buy a box of crayons for ₹192 and pay with a ₹500 note. How much change do you get, in rupees?
6. 6.12 + 29 =
7. 7.19 + 5 =
8. 8.21 children stand in rows of 5. How many full rows can they make?
9. 9.5% of ₹100 =
10. 10.54 + ? = 100
11. 11.Best estimate of 321 + 131? (a) 200 (b) 400 (c) 600
12. 12.Half of 56 =
13. 13.15 + 17 =
14. 14.65 − 37 =
15. 15.You start your homework at 8:05 and finish at 11:10. How many minutes did you work?
16. 16.505 − 491 =
17. 17.58 laddoos are packed in boxes of 7. How many laddoos are left over?
18. 18.76 − 65 =
19. 19.39 × 8 =
20. 20.25% of ₹620 =
21. 21.54 + 41 =
22. 22.86 + 17 =
23. 23.75 + 7 =
24. 24.23 + 25 =
25. 25.20 + 19 =
26. 26.49 + 3 =
27. 27.Best estimate of 293 + 804? (a) 1100 (b) 1300 (c) 900
28. 28.A train leaves at 3:10 and reaches the next city at 5:10. How many minutes is the journey?
29. 29.57 + 57 =
30. 30.Double 37 =
31. 31.19² =
32. 32.88 − 9 =
33. 33.85 + 33 =
34. 34.10 + 11 =
35. 35.4 + ? = 10
36. 36.76 + 8 =
37. 37.Half of 156 =
38. 38.12 + 14 =
39. 39.23 laddoos are packed in boxes of 4. How many laddoos are left over?
40. 40.Best estimate of 742 + 600? (a) 1300 (b) 1100 (c) 1500

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