Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 262 · 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. 1.33 × 6 =
2. 2.27 + 5 =
3. 3.Best estimate of 82 × 96? (a) 800 (b) 80000 (c) 8000
4. 4.Double 22 =
5. 5.57 − 13 =
6. 6.435 ÷ 5 =
7. 7.90 − 29 =
8. 8.17 + 9 =
9. 9.5 + ? = 10
10. 10.17 + 18 =
11. 11.8 + ? = 10
12. 12.Best estimate of 175 + 148? (a) 100 (b) 500 (c) 300
13. 13.30 + 31 =
14. 14.7 + 6 =
15. 15.213 − 198 =
16. 16.264 ÷ 8 =
17. 17.64 − 17 =
18. 18.232 ÷ 4 =
19. 19.45 + ? = 100
20. 20.Best estimate of 390 + 399? (a) 800 (b) 600 (c) 1000
21. 21.78 children stand in rows of 8. How many full rows can they make?
22. 22.You buy a kite for ₹27 and pay with a ₹100 note. How much change do you get, in rupees?
23. 23.39 × 8 =
24. 24.85 + 7 =
25. 25.304 ÷ 8 =
26. 26.32 × 8 =
27. 27.Best estimate of 14 × 26? (a) 3000 (b) 30 (c) 300
28. 28.81 × 3 =
29. 29.You buy a storybook for ₹11 and pay with a ₹100 note. How much change do you get, in rupees?
30. 30.226 − 194 =
31. 31.12 + 14 =
32. 32.48 ÷ 4 =
33. 33.You buy a box of crayons for ₹227 and pay with a ₹500 note. How much change do you get, in rupees?
34. 34.16² =
35. 35.22 + 27 =
36. 36.Double 67 =
37. 37.2 + ? = 10
38. 38.What is the remainder when 65 is divided by 9?
39. 39.228 ÷ 4 =
40. 40.45 − 19 =

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