Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 217 · 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.Best estimate of 16 × 77? (a) 160 (b) 1600 (c) 16000
2. 2.29 + 6 =
3. 3.90 − 72 =
4. 4.Half of 184 =
5. 5.30 + 24 =
6. 6.81 + 19 =
7. 7.6 + 7 =
8. 8.31 + 79 =
9. 9.224 ÷ 8 =
10. 10.5% of ₹410 =
11. 11.You buy a notebook for ₹81 and pay with a ₹100 note. How much change do you get, in rupees?
12. 12.14 + 16 =
13. 13.You buy a bag of mangoes for ₹37 and pay with a ₹100 note. How much change do you get, in rupees?
14. 14.18 × 4 =
15. 15.43 laddoos are packed in boxes of 3. How many laddoos are left over?
16. 16.213 − 179 =
17. 17.You buy a bag of mangoes for ₹34 and a pen for ₹30. You pay with a ₹100 note. How much change do you get, in rupees?
18. 18.82 − 19 =
19. 19.1021 − 993 =
20. 20.29² =
21. 21.Best estimate of 72 × 12? (a) 7000 (b) 70 (c) 700
22. 22.27 + 29 =
23. 23.8 + 9 =
24. 24.25% of ₹690 =
25. 25.54 + 19 =
26. 26.66 + 19 =
27. 27.84 + 13 =
28. 28.53 − 32 =
29. 29.52 + ? = 100
30. 30.32 + 51 =
31. 31.You buy a notebook for ₹50 and pay with a ₹100 note. How much change do you get, in rupees?
32. 32.Double 71 =
33. 33.40 × 4 =
34. 34.You start your homework at 6:20 and finish at 7:55. How many minutes did you work?
35. 35.What is the remainder when 17 is divided by 3?
36. 36.27² =
37. 37.Double 49 =
38. 38.1021 − 985 =
39. 39.272 ÷ 8 =
40. 40.13² =

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