Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 588 · 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. 1.24 × 8 =
2. 2.140 ÷ 4 =
3. 3.86 + 47 =
4. 4.392 ÷ 4 =
5. 5.1002 − 986 =
6. 6.70 + 75 =
7. 7.77 + 7 =
8. 8.82 − 65 =
9. 9.Best estimate of 782 + 735? (a) 1700 (b) 1300 (c) 1500
10. 10.93 × 7 =
11. 11.162 ÷ 9 =
12. 12.21² =
13. 13.53 − 32 =
14. 14.63 × 4 =
15. 15.78 − 59 =
16. 16.You buy a notebook for ₹33 and pay with a ₹100 note. How much change do you get, in rupees?
17. 17.Best estimate of 26 × 54? (a) 15000 (b) 1500 (c) 150
18. 18.57 × 4 =
19. 19.You buy a water bottle for ₹42 and a pen for ₹19. You pay with a ₹100 note. How much change do you get, in rupees?
20. 20.71 + 28 =
21. 21.1 + ? = 10
22. 22.What is the remainder when 27 is divided by 4?
23. 23.72 + 42 =
24. 24.29 laddoos are packed in boxes of 4. How many laddoos are left over?
25. 25.18 × 7 =
26. 26.51 + 62 =
27. 27.16² =
28. 28.7 + 8 =
29. 29.37 + 61 =
30. 30.25² =
31. 31.170 ÷ 5 =
32. 32.You start your homework at 1:20 and finish at 3:10. How many minutes did you work?
33. 33.Best estimate of 70 × 21? (a) 1400 (b) 14000 (c) 140
34. 34.Double 25 =
35. 35.25 + 29 =
36. 36.54 + ? = 100
37. 37.38 × 4 =
38. 38.75 + 29 =
39. 39.15² =
40. 40.532 ÷ 7 =

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