Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 144 · 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. 1.89 − 69 =
2. 2.50% of ₹60 =
3. 3.7 + 8 =
4. 4.You buy a storybook for ₹30 and a pen for ₹42. You pay with a ₹100 note. How much change do you get, in rupees?
5. 5.Best estimate of 196 + 404? (a) 400 (b) 600 (c) 800
6. 6.27² =
7. 7.59 + 32 =
8. 8.7 + ? = 10
9. 9.13 + ? = 100
10. 10.29 + 30 =
11. 11.41 × 4 =
12. 12.17 + 18 =
13. 13.85 + 8 =
14. 14.208 ÷ 4 =
15. 15.490 − 99 =
16. 16.You buy a storybook for ₹88 and pay with a ₹100 note. How much change do you get, in rupees?
17. 17.17 × 5 =
18. 18.63 × 9 =
19. 19.79 − 35 =
20. 20.14 laddoos are packed in boxes of 3. How many laddoos are left over?
21. 21.8 + 3 =
22. 22.270 ÷ 5 =
23. 23.12 × 8 =
24. 24.89 + ? = 100
25. 25.515 − 476 =
26. 26.23² =
27. 27.16² =
28. 28.85 − 29 =
29. 29.14 + 19 =
30. 30.101 children stand in rows of 9. How many full rows can they make?
31. 31.164 ÷ 4 =
32. 32.232 ÷ 8 =
33. 33.31 × 8 =
34. 34.336 ÷ 6 =
35. 35.Best estimate of 76 × 50? (a) 400 (b) 40000 (c) 4000
36. 36.You buy a kite for ₹45 and a pen for ₹13. You pay with a ₹100 note. How much change do you get, in rupees?
37. 37.20 + 22 =
38. 38.55 + 9 =
39. 39.34 × 7 =
40. 40.546 ÷ 7 =

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