Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 97 · 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. 1.38 + 18 =
2. 2.17 + 19 =
3. 3.You buy a storybook for ₹32 and pay with a ₹100 note. How much change do you get, in rupees?
4. 4.You buy a storybook for ₹118 and pay with a ₹500 note. How much change do you get, in rupees?
5. 5.95 − 29 =
6. 6.25% of ₹460 =
7. 7.Half of 72 =
8. 8.Best estimate of 848 + 864? (a) 1700 (b) 1900 (c) 1500
9. 9.25 + 38 =
10. 10.447 + 99 =
11. 11.92 ÷ 4 =
12. 12.129 − 79 =
13. 13.27 + 28 =
14. 14.21² =
15. 15.58 + 59 =
16. 16.88 ÷ 8 =
17. 17.23² =
18. 18.5% of ₹500 =
19. 19.63 + 41 =
20. 20.22 + 45 =
21. 21.22² =
22. 22.Best estimate of 81 × 51? (a) 4000 (b) 40000 (c) 400
23. 23.13 + 14 =
24. 24.You buy a bag of mangoes for ₹33 and a pen for ₹16. You pay with a ₹100 note. How much change do you get, in rupees?
25. 25.Double 37 =
26. 26.61 × 4 =
27. 27.95 laddoos are packed in boxes of 8. How many laddoos are left over?
28. 28.54 + ? = 100
29. 29.13 × 8 =
30. 30.46 + 55 =
31. 31.8 + ? = 10
32. 32.Double 99 =
33. 33.What is the remainder when 47 is divided by 3?
34. 34.25 + 8 =
35. 35.498 ÷ 6 =
36. 36.28 + 30 =
37. 37.240 ÷ 4 =
38. 38.493 + 99 =
39. 39.29² =
40. 40.152 ÷ 8 =

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