Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 857 · 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. 1.43 + 9 =
2. 2.89 − 28 =
3. 3.378 + 99 =
4. 4.50% of ₹180 =
5. 5.59 − 23 =
6. 6.74 − 44 =
7. 7.A film starts at 4:00 and ends at 5:50. How many minutes long is the film?
8. 8.67 + 8 =
9. 9.100 laddoos are packed in boxes of 9. How many laddoos are left over?
10. 10.124 ÷ 4 =
11. 11.50% of ₹880 =
12. 12.10% of ₹430 =
13. 13.5% of ₹630 =
14. 14.80 − 66 =
15. 15.204 ÷ 4 =
16. 16.87 × 6 =
17. 17.You buy a box of crayons for ₹266 and pay with a ₹500 note. How much change do you get, in rupees?
18. 18.39 × 5 =
19. 19.18² =
20. 20.5% of ₹90 =
21. 21.66 − 9 =
22. 22.85 + 7 =
23. 23.23² =
24. 24.95 × 8 =
25. 25.You buy a bag of mangoes for ₹13 and a pen for ₹39. You pay with a ₹100 note. How much change do you get, in rupees?
26. 26.232 ÷ 4 =
27. 27.97 × 4 =
28. 28.25% of ₹80 =
29. 29.Best estimate of 26 × 66? (a) 21000 (b) 210 (c) 2100
30. 30.117 ÷ 3 =
31. 31.59 children stand in rows of 9. How many full rows can they make?
32. 32.12 × 8 =
33. 33.11 + 12 =
34. 34.6 + 7 =
35. 35.109 − 64 =
36. 36.Best estimate of 34 × 37? (a) 120 (b) 12000 (c) 1200
37. 37.65 − 36 =
38. 38.89 − 19 =
39. 39.23 × 4 =
40. 40.45 + 6 =

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