Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 629 · 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.Double 19 =
2. 2.You buy a kite for ₹346 and pay with a ₹500 note. How much change do you get, in rupees?
3. 3.71 + 31 =
4. 4.23² =
5. 5.25² =
6. 6.What is the remainder when 74 is divided by 8?
7. 7.What is the remainder when 29 is divided by 6?
8. 8.232 ÷ 4 =
9. 9.87 + 5 =
10. 10.A cricket match starts at 2:35 and the first innings ends at 4:35. How many minutes did the innings last?
11. 11.27² =
12. 12.21 + 22 =
13. 13.86 − 64 =
14. 14.15 + 14 =
15. 15.52 ÷ 4 =
16. 16.71 × 3 =
17. 17.You buy a cricket ball for ₹11 and a pen for ₹11. You pay with a ₹100 note. How much change do you get, in rupees?
18. 18.312 ÷ 8 =
19. 19.12² =
20. 20.64 − 45 =
21. 21.30 × 8 =
22. 22.26² =
23. 23.Best estimate of 59 × 16? (a) 120 (b) 12000 (c) 1200
24. 24.31 + ? = 100
25. 25.216 ÷ 4 =
26. 26.11 + 12 =
27. 27.107 − 95 =
28. 28.72 + 46 =
29. 29.33 × 9 =
30. 30.Best estimate of 96 × 78? (a) 80000 (b) 8000 (c) 800
31. 31.95 × 7 =
32. 32.693 ÷ 7 =
33. 33.40 × 8 =
34. 34.You start your homework at 1:55 and finish at 3:00. How many minutes did you work?
35. 35.26 + 44 =
36. 36.236 ÷ 4 =
37. 37.74 − 33 =
38. 38.32 × 8 =
39. 39.7 + 8 =
40. 40.31 × 4 =

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