Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 896 · 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 46 =
2. 2.Best estimate of 43 × 57? (a) 24000 (b) 2400 (c) 240
3. 3.5% of ₹640 =
4. 4.52 − 46 =
5. 5.79 + ? = 100
6. 6.15 + ? = 100
7. 7.You start your homework at 6:25 and finish at 9:40. How many minutes did you work?
8. 8.Double 32 =
9. 9.23² =
10. 10.Best estimate of 130 + 741? (a) 800 (b) 1000 (c) 600
11. 11.79 − 9 =
12. 12.84 ÷ 4 =
13. 13.95 − 78 =
14. 14.184 ÷ 8 =
15. 15.96 − 59 =
16. 16.You buy a kite for ₹37 and a pen for ₹39. You pay with a ₹100 note. How much change do you get, in rupees?
17. 17.27 + 26 =
18. 18.85 − 18 =
19. 19.26² =
20. 20.15 + 16 =
21. 21.58 + ? = 100
22. 22.25% of ₹470 =
23. 23.75 + ? = 100
24. 24.4 + ? = 10
25. 25.128 ÷ 8 =
26. 26.17 + 16 =
27. 27.A cricket match starts at 2:00 and the first innings ends at 5:05. How many minutes did the innings last?
28. 28.75 + 12 =
29. 29.28 + 29 =
30. 30.30 + 73 =
31. 31.22 laddoos are packed in boxes of 4. How many laddoos are left over?
32. 32.78 + 7 =
33. 33.25 × 4 =
34. 34.10% of ₹550 =
35. 35.You start your homework at 6:30 and finish at 9:45. How many minutes did you work?
36. 36.5 + ? = 10
37. 37.A train leaves at 4:40 and reaches the next city at 6:00. How many minutes is the journey?
38. 38.5% of ₹320 =
39. 39.508 − 493 =
40. 40.61 × 4 =

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