Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 298 · 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. 1.61 − 31 =
2. 2.Best estimate of 87 × 18? (a) 18000 (b) 180 (c) 1800
3. 3.9 + 9 =
4. 4.You buy a box of crayons for ₹29 and a pen for ₹21. You pay with a ₹100 note. How much change do you get, in rupees?
5. 5.24 children stand in rows of 5. How many full rows can they make?
6. 6.Double 34 =
7. 7.224 ÷ 8 =
8. 8.24² =
9. 9.Half of 136 =
10. 10.502 − 498 =
11. 11.16 × 8 =
12. 12.Best estimate of 93 × 69? (a) 630 (b) 63000 (c) 6300
13. 13.81 + ? = 100
14. 14.53 + 49 =
15. 15.21 + 9 =
16. 16.57 + ? = 100
17. 17.68 − 52 =
18. 18.60 − 16 =
19. 19.Double 61 =
20. 20.Double 35 =
21. 21.68 + ? = 100
22. 22.25 − 19 =
23. 23.82 + ? = 100
24. 24.8 + ? = 10
25. 25.6 + ? = 10
26. 26.140 ÷ 5 =
27. 27.56 × 4 =
28. 28.77 − 9 =
29. 29.Double 81 =
30. 30.Best estimate of 79 × 51? (a) 4000 (b) 400 (c) 40000
31. 31.95 − 55 =
32. 32.43 children stand in rows of 4. How many full rows can they make?
33. 33.39 + 5 =
34. 34.19 + 18 =
35. 35.11² =
36. 36.You buy a notebook for ₹37 and a pen for ₹29. You pay with a ₹100 note. How much change do you get, in rupees?
37. 37.You buy a bag of mangoes for ₹134 and pay with a ₹500 note. How much change do you get, in rupees?
38. 38.What is the remainder when 20 is divided by 3?
39. 39.11 + 13 =
40. 40.79 + 38 =

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