Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 798 · 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. 1.145 ÷ 5 =
2. 2.10% of ₹350 =
3. 3.Best estimate of 216 + 235? (a) 600 (b) 400 (c) 200
4. 4.85 − 51 =
5. 5.96 ÷ 8 =
6. 6.Double 52 =
7. 7.46 + 7 =
8. 8.Best estimate of 351 + 733? (a) 1300 (b) 900 (c) 1100
9. 9.44 × 9 =
10. 10.74 − 38 =
11. 11.22 × 5 =
12. 12.22 + 24 =
13. 13.You buy a box of crayons for ₹492 and pay with a ₹500 note. How much change do you get, in rupees?
14. 14.15² =
15. 15.Double 38 =
16. 16.84 ÷ 4 =
17. 17.42 + 29 =
18. 18.105 ÷ 5 =
19. 19.You buy a kite for ₹277 and pay with a ₹500 note. How much change do you get, in rupees?
20. 20.78 + 3 =
21. 21.You buy a pencil box for ₹332 and pay with a ₹500 note. How much change do you get, in rupees?
22. 22.38 + 54 =
23. 23.21 × 3 =
24. 24.34 × 8 =
25. 25.Best estimate of 579 + 731? (a) 1300 (b) 1100 (c) 1500
26. 26.Best estimate of 94 × 49? (a) 45000 (b) 450 (c) 4500
27. 27.27 × 8 =
28. 28.288 ÷ 8 =
29. 29.63 + 51 =
30. 30.14 + 15 =
31. 31.92 − 68 =
32. 32.13² =
33. 33.25% of ₹460 =
34. 34.88 × 4 =
35. 35.Best estimate of 67 × 27? (a) 210 (b) 21000 (c) 2100
36. 36.109 − 65 =
37. 37.You buy a box of crayons for ₹204 and pay with a ₹500 note. How much change do you get, in rupees?
38. 38.71 × 5 =
39. 39.69 + 5 =
40. 40.Best estimate of 20 × 32? (a) 6000 (b) 60 (c) 600

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