Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 308 · 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. 1.17 + 5 =
2. 2.Best estimate of 58 × 62? (a) 3600 (b) 36000 (c) 360
3. 3.792 ÷ 8 =
4. 4.You buy a box of crayons for ₹190 and pay with a ₹500 note. How much change do you get, in rupees?
5. 5.Double 69 =
6. 6.Double 51 =
7. 7.Best estimate of 56 × 61? (a) 3600 (b) 36000 (c) 360
8. 8.60 − 26 =
9. 9.76 + 5 =
10. 10.3 + ? = 10
11. 11.63 + 9 =
12. 12.56 ÷ 4 =
13. 13.44 + 89 =
14. 14.Best estimate of 70 × 36? (a) 2800 (b) 28000 (c) 280
15. 15.51 + 19 =
16. 16.38 × 5 =
17. 17.39 + 14 =
18. 18.130 ÷ 5 =
19. 19.69 + ? = 100
20. 20.What is the remainder when 37 is divided by 6?
21. 21.Half of 172 =
22. 22.Best estimate of 701 + 874? (a) 1400 (b) 1800 (c) 1600
23. 23.15 × 5 =
24. 24.686 ÷ 7 =
25. 25.You buy a water bottle for ₹86 and pay with a ₹100 note. How much change do you get, in rupees?
26. 26.164 ÷ 4 =
27. 27.204 ÷ 4 =
28. 28.84 ÷ 6 =
29. 29.19 × 8 =
30. 30.12² =
31. 31.13² =
32. 32.116 ÷ 4 =
33. 33.121 − 78 =
34. 34.21 × 4 =
35. 35.80 − 19 =
36. 36.You start your homework at 2:30 and finish at 3:30. How many minutes did you work?
37. 37.96 ÷ 8 =
38. 38.Best estimate of 757 + 447? (a) 1000 (b) 1400 (c) 1200
39. 39.55 + 9 =
40. 40.19 + 4 =

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