Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 225 · 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 58 × 60? (a) 36000 (b) 360 (c) 3600
2. 2.6 + 5 =
3. 3.22² =
4. 4.53 × 4 =
5. 5.160 ÷ 8 =
6. 6.75 + 7 =
7. 7.20 + 21 =
8. 8.14² =
9. 9.12² =
10. 10.44 + ? = 100
11. 11.Double 99 =
12. 12.You start your homework at 1:35 and finish at 2:50. How many minutes did you work?
13. 13.5 + 9 =
14. 14.Best estimate of 33 × 50? (a) 15000 (b) 1500 (c) 150
15. 15.87 + 8 =
16. 16.93 − 29 =
17. 17.26 + 61 =
18. 18.You buy a kite for ₹15 and a pen for ₹28. You pay with a ₹100 note. How much change do you get, in rupees?
19. 19.What is the remainder when 123 is divided by 8?
20. 20.66 + 9 =
21. 21.55 + 8 =
22. 22.26 × 8 =
23. 23.567 ÷ 7 =
24. 24.Best estimate of 324 + 256? (a) 800 (b) 400 (c) 600
25. 25.61 + ? = 100
26. 26.82 − 61 =
27. 27.53 laddoos are packed in boxes of 6. How many laddoos are left over?
28. 28.Best estimate of 78 × 76? (a) 640 (b) 64000 (c) 6400
29. 29.7 + 9 =
30. 30.18 + 4 =
31. 31.1007 − 985 =
32. 32.19² =
33. 33.7 + ? = 10
34. 34.What is the remainder when 25 is divided by 3?
35. 35.175 ÷ 7 =
36. 36.176 ÷ 4 =
37. 37.You buy a pencil box for ₹35 and a pen for ₹45. You pay with a ₹100 note. How much change do you get, in rupees?
38. 38.What is the remainder when 39 is divided by 8?
39. 39.873 − 99 =
40. 40.165 ÷ 5 =

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