Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 980 · 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.You buy a notebook for ₹79 and pay with a ₹100 note. How much change do you get, in rupees?
2. 2.10% of ₹840 =
3. 3.10% of ₹410 =
4. 4.50 + 24 =
5. 5.248 ÷ 8 =
6. 6.272 ÷ 8 =
7. 7.13² =
8. 8.91 − 71 =
9. 9.Best estimate of 51 × 96? (a) 50000 (b) 500 (c) 5000
10. 10.10% of ₹900 =
11. 11.Best estimate of 16 × 78? (a) 160 (b) 1600 (c) 16000
12. 12.Double 31 =
13. 13.7 + ? = 10
14. 14.97 × 9 =
15. 15.312 ÷ 8 =
16. 16.414 + 99 =
17. 17.You buy a cricket ball for ₹40 and a pen for ₹39. You pay with a ₹100 note. How much change do you get, in rupees?
18. 18.10% of ₹740 =
19. 19.A cricket match starts at 6:10 and the first innings ends at 6:40. How many minutes did the innings last?
20. 20.73 × 4 =
21. 21.Half of 48 =
22. 22.82 × 4 =
23. 23.Best estimate of 845 + 869? (a) 1700 (b) 1500 (c) 1900
24. 24.89 − 67 =
25. 25.85 − 28 =
26. 26.11 + 12 =
27. 27.Half of 182 =
28. 28.27² =
29. 29.40 + 86 =
30. 30.57 + 59 =
31. 31.60 − 38 =
32. 32.Best estimate of 564 + 698? (a) 1300 (b) 1100 (c) 1500
33. 33.Best estimate of 76 × 17? (a) 160 (b) 16000 (c) 1600
34. 34.85 − 29 =
35. 35.38 × 8 =
36. 36.73 + ? = 100
37. 37.270 ÷ 5 =
38. 38.You buy a pencil box for ₹495 and pay with a ₹500 note. How much change do you get, in rupees?
39. 39.You buy a bag of mangoes for ₹27 and a pen for ₹27. You pay with a ₹100 note. How much change do you get, in rupees?
40. 40.75 children stand in rows of 7. How many full rows can they make?

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