Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 344 · 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. 1.69 − 9 =
2. 2.405 ÷ 5 =
3. 3.Best estimate of 78 × 91? (a) 7200 (b) 720 (c) 72000
4. 4.You buy a bag of mangoes for ₹28 and a pen for ₹27. You pay with a ₹100 note. How much change do you get, in rupees?
5. 5.54 − 28 =
6. 6.7 + 6 =
7. 7.38 laddoos are packed in boxes of 3. How many laddoos are left over?
8. 8.217 − 196 =
9. 9.You buy a storybook for ₹335 and pay with a ₹500 note. How much change do you get, in rupees?
10. 10.318 + 99 =
11. 11.38 + 6 =
12. 12.23² =
13. 13.13 × 3 =
14. 14.303 − 286 =
15. 15.17 + 19 =
16. 16.Best estimate of 78 × 69? (a) 56000 (b) 5600 (c) 560
17. 17.43 × 7 =
18. 18.50 × 4 =
19. 19.You buy a pencil box for ₹117 and pay with a ₹500 note. How much change do you get, in rupees?
20. 20.Double 43 =
21. 21.Best estimate of 277 + 280? (a) 600 (b) 800 (c) 400
22. 22.13 × 8 =
23. 23.Best estimate of 70 × 73? (a) 490 (b) 49000 (c) 4900
24. 24.47 − 29 =
25. 25.29 + 30 =
26. 26.73 − 18 =
27. 27.19² =
28. 28.21² =
29. 29.Best estimate of 38 × 26? (a) 1200 (b) 120 (c) 12000
30. 30.76 + 8 =
31. 31.A train leaves at 6:55 and reaches the next city at 9:40. How many minutes is the journey?
32. 32.A film starts at 6:25 and ends at 9:10. How many minutes long is the film?
33. 33.5% of ₹220 =
34. 34.20 + 19 =
35. 35.24² =
36. 36.120 ÷ 8 =
37. 37.9 + 5 =
38. 38.You buy a bag of mangoes for ₹176 and pay with a ₹500 note. How much change do you get, in rupees?
39. 39.37 + 19 =
40. 40.Double 17 =

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