Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 268 · 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. 1.46 + 7 =
2. 2.15² =
3. 3.232 ÷ 8 =
4. 4.You buy a storybook for ₹28 and a pen for ₹29. You pay with a ₹100 note. How much change do you get, in rupees?
5. 5.41 + 29 =
6. 6.192 ÷ 8 =
7. 7.228 ÷ 4 =
8. 8.5% of ₹280 =
9. 9.42 − 19 =
10. 10.77 − 29 =
11. 11.61 + 29 =
12. 12.Half of 98 =
13. 13.26² =
14. 14.Best estimate of 26 × 39? (a) 120 (b) 12000 (c) 1200
15. 15.66 + 18 =
16. 16.A train leaves at 7:15 and reaches the next city at 9:20. How many minutes is the journey?
17. 17.32 − 9 =
18. 18.Best estimate of 26 × 96? (a) 30000 (b) 3000 (c) 300
19. 19.25 laddoos are packed in boxes of 3. How many laddoos are left over?
20. 20.25 + 27 =
21. 21.Best estimate of 627 + 335? (a) 700 (b) 1100 (c) 900
22. 22.83 + 43 =
23. 23.You buy a bag of mangoes for ₹235 and pay with a ₹500 note. How much change do you get, in rupees?
24. 24.You buy a storybook for ₹69 and pay with a ₹100 note. How much change do you get, in rupees?
25. 25.61 − 9 =
26. 26.29² =
27. 27.25 × 4 =
28. 28.14 × 4 =
29. 29.14² =
30. 30.19 + 18 =
31. 31.72 + 63 =
32. 32.31 + ? = 100
33. 33.Double 21 =
34. 34.36 × 4 =
35. 35.28² =
36. 36.276 ÷ 3 =
37. 37.10% of ₹340 =
38. 38.Half of 166 =
39. 39.A film starts at 4:30 and ends at 7:35. How many minutes long is the film?
40. 40.70 + 31 =

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