Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 223 · 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. 1.18 + 8 =
2. 2.17 + 29 =
3. 3.123 − 91 =
4. 4.80 − 25 =
5. 5.12 + ? = 100
6. 6.59 × 4 =
7. 7.30 + 31 =
8. 8.309 − 277 =
9. 9.You buy a kite for ₹86 and pay with a ₹100 note. How much change do you get, in rupees?
10. 10.144 ÷ 6 =
11. 11.19² =
12. 12.60 − 19 =
13. 13.You buy a storybook for ₹447 and pay with a ₹500 note. How much change do you get, in rupees?
14. 14.Best estimate of 559 + 130? (a) 900 (b) 700 (c) 500
15. 15.21² =
16. 16.100 ÷ 4 =
17. 17.25% of ₹40 =
18. 18.665 ÷ 7 =
19. 19.450 ÷ 6 =
20. 20.69 − 22 =
21. 21.You buy a cricket ball for ₹83 and pay with a ₹100 note. How much change do you get, in rupees?
22. 22.Best estimate of 237 + 669? (a) 900 (b) 700 (c) 1100
23. 23.83 − 71 =
24. 24.85 + 12 =
25. 25.4 + ? = 10
26. 26.432 ÷ 8 =
27. 27.You buy a storybook for ₹265 and pay with a ₹500 note. How much change do you get, in rupees?
28. 28.232 ÷ 8 =
29. 29.26 × 8 =
30. 30.8 + 7 =
31. 31.65 − 36 =
32. 32.Best estimate of 280 + 336? (a) 800 (b) 600 (c) 400
33. 33.46 + 59 =
34. 34.11² =
35. 35.156 ÷ 4 =
36. 36.47 × 4 =
37. 37.308 ÷ 7 =
38. 38.22² =
39. 39.52 + 29 =
40. 40.29 + 9 =

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