Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 929 · 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.Half of 100 =
2. 2.69 − 40 =
3. 3.18 + 20 =
4. 4.94 − 57 =
5. 5.3 + ? = 10
6. 6.Best estimate of 18 × 36? (a) 80 (b) 8000 (c) 800
7. 7.24 × 8 =
8. 8.Double 71 =
9. 9.Double 34 =
10. 10.112 − 87 =
11. 11.116 − 88 =
12. 12.89 − 41 =
13. 13.58 + 22 =
14. 14.10% of ₹590 =
15. 15.102 ÷ 6 =
16. 16.21² =
17. 17.314 − 291 =
18. 18.Best estimate of 795 + 877? (a) 1700 (b) 1500 (c) 1900
19. 19.301 − 294 =
20. 20.Double 82 =
21. 21.A film starts at 4:25 and ends at 7:40. How many minutes long is the film?
22. 22.What is the remainder when 71 is divided by 7?
23. 23.Half of 38 =
24. 24.29 + 28 =
25. 25.11 + 13 =
26. 26.50% of ₹480 =
27. 27.58 + 4 =
28. 28.25% of ₹40 =
29. 29.144 ÷ 8 =
30. 30.38 + 9 =
31. 31.864 ÷ 9 =
32. 32.79 laddoos are packed in boxes of 8. How many laddoos are left over?
33. 33.70 + 14 =
34. 34.22 × 9 =
35. 35.111 − 85 =
36. 36.69 × 4 =
37. 37.You buy a bag of mangoes for ₹43 and pay with a ₹100 note. How much change do you get, in rupees?
38. 38.50% of ₹750 =
39. 39.You buy a box of crayons for ₹85 and pay with a ₹100 note. How much change do you get, in rupees?
40. 40.25 + 7 =

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