Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 293 · 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. 1.25% of ₹860 =
2. 2.73 − 28 =
3. 3.21 + ? = 100
4. 4.204 − 184 =
5. 5.38 + 23 =
6. 6.97 − 77 =
7. 7.60 ÷ 5 =
8. 8.22 + 23 =
9. 9.21² =
10. 10.77 + 18 =
11. 11.144 ÷ 8 =
12. 12.61 × 4 =
13. 13.50% of ₹290 =
14. 14.16 + 17 =
15. 15.176 ÷ 4 =
16. 16.37 + 4 =
17. 17.78 ÷ 3 =
18. 18.18 + 4 =
19. 19.527 − 487 =
20. 20.51 × 5 =
21. 21.29 × 4 =
22. 22.Best estimate of 47 × 28? (a) 150 (b) 1500 (c) 15000
23. 23.Best estimate of 20 × 47? (a) 100 (b) 10000 (c) 1000
24. 24.66 + 7 =
25. 25.Best estimate of 473 + 855? (a) 1200 (b) 1600 (c) 1400
26. 26.8 + ? = 10
27. 27.You buy a box of crayons for ₹35 and a pen for ₹43. You pay with a ₹100 note. How much change do you get, in rupees?
28. 28.You buy a storybook for ₹23 and pay with a ₹100 note. How much change do you get, in rupees?
29. 29.36 × 8 =
30. 30.59 laddoos are packed in boxes of 6. How many laddoos are left over?
31. 31.74 + ? = 100
32. 32.38 children stand in rows of 8. How many full rows can they make?
33. 33.372 ÷ 6 =
34. 34.69 + 5 =
35. 35.11² =
36. 36.20 + 21 =
37. 37.A train leaves at 7:10 and reaches the next city at 9:45. How many minutes is the journey?
38. 38.2 + ? = 10
39. 39.What is the remainder when 46 is divided by 7?
40. 40.61 − 9 =

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