Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 835 · 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. 1.87 × 6 =
2. 2.523 − 481 =
3. 3.37 children stand in rows of 8. How many full rows can they make?
4. 4.34 + 68 =
5. 5.26 children stand in rows of 3. How many full rows can they make?
6. 6.213 − 176 =
7. 7.50% of ₹720 =
8. 8.Best estimate of 43 × 42? (a) 16000 (b) 1600 (c) 160
9. 9.50 + 41 =
10. 10.What is the remainder when 25 is divided by 3?
11. 11.54 × 3 =
12. 12.13 + 9 =
13. 13.81 + ? = 100
14. 14.10% of ₹180 =
15. 15.68 + ? = 100
16. 16.50 + 44 =
17. 17.118 − 77 =
18. 18.31 laddoos are packed in boxes of 7. How many laddoos are left over?
19. 19.5 + ? = 10
20. 20.240 ÷ 4 =
21. 21.You buy a kite for ₹43 and a pen for ₹40. You pay with a ₹100 note. How much change do you get, in rupees?
22. 22.Best estimate of 510 + 751? (a) 1300 (b) 1500 (c) 1100
23. 23.What is the remainder when 30 is divided by 4?
24. 24.17 + 18 =
25. 25.46 + ? = 100
26. 26.43 × 7 =
27. 27.36 × 6 =
28. 28.A cricket match starts at 3:30 and the first innings ends at 4:40. How many minutes did the innings last?
29. 29.103 − 98 =
30. 30.77 − 18 =
31. 31.Best estimate of 484 + 198? (a) 900 (b) 500 (c) 700
32. 32.25 + 29 =
33. 33.307 − 296 =
34. 34.46 + 23 =
35. 35.91 × 9 =
36. 36.23 + 9 =
37. 37.63 × 8 =
38. 38.Half of 158 =
39. 39.59 − 34 =
40. 40.227 − 177 =

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