Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 905 · 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. 1.31 × 4 =
2. 2.144 ÷ 8 =
3. 3.36 × 5 =
4. 4.Half of 132 =
5. 5.45 + 22 =
6. 6.143 + 99 =
7. 7.72 − 19 =
8. 8.13 + 12 =
9. 9.You buy a bag of mangoes for ₹15 and pay with a ₹100 note. How much change do you get, in rupees?
10. 10.28 children stand in rows of 6. How many full rows can they make?
11. 11.18 + 17 =
12. 12.875 − 99 =
13. 13.Best estimate of 17 × 50? (a) 100 (b) 1000 (c) 10000
14. 14.6 + 8 =
15. 15.71 laddoos are packed in boxes of 6. How many laddoos are left over?
16. 16.60 − 39 =
17. 17.80 − 9 =
18. 18.19 × 6 =
19. 19.Best estimate of 32 × 14? (a) 30 (b) 3000 (c) 300
20. 20.What is the remainder when 58 is divided by 9?
21. 21.264 + 99 =
22. 22.128 − 98 =
23. 23.41 − 19 =
24. 24.28² =
25. 25.39 − 29 =
26. 26.61 + 67 =
27. 27.120 ÷ 8 =
28. 28.89 − 29 =
29. 29.You buy a notebook for ₹337 and pay with a ₹500 note. How much change do you get, in rupees?
30. 30.A cricket match starts at 2:45 and the first innings ends at 5:40. How many minutes did the innings last?
31. 31.85 − 55 =
32. 32.109 − 63 =
33. 33.440 ÷ 5 =
34. 34.54 + 89 =
35. 35.1013 − 992 =
36. 36.61 × 4 =
37. 37.25% of ₹350 =
38. 38.Best estimate of 43 × 43? (a) 16000 (b) 160 (c) 1600
39. 39.11² =
40. 40.56 + 5 =

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