Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 875 · 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. 1.76 − 28 =
2. 2.49 + 29 =
3. 3.Half of 36 =
4. 4.21 × 8 =
5. 5.33 + ? = 100
6. 6.16 + 9 =
7. 7.9 + ? = 10
8. 8.64 + 81 =
9. 9.24² =
10. 10.53 + 27 =
11. 11.Best estimate of 50 × 79? (a) 40000 (b) 4000 (c) 400
12. 12.35 + 6 =
13. 13.5 + ? = 10
14. 14.1 + ? = 10
15. 15.320 ÷ 8 =
16. 16.54 + 51 =
17. 17.57 + 7 =
18. 18.A cricket match starts at 3:10 and the first innings ends at 5:50. How many minutes did the innings last?
19. 19.Double 96 =
20. 20.You buy a notebook for ₹33 and pay with a ₹100 note. How much change do you get, in rupees?
21. 21.46 + 9 =
22. 22.26 + 28 =
23. 23.188 ÷ 4 =
24. 24.30 + 74 =
25. 25.What is the remainder when 43 is divided by 3?
26. 26.Best estimate of 12 × 57? (a) 60 (b) 6000 (c) 600
27. 27.93 − 29 =
28. 28.28 + 29 =
29. 29.50% of ₹380 =
30. 30.29 × 7 =
31. 31.5% of ₹40 =
32. 32.100 ÷ 4 =
33. 33.183 ÷ 3 =
34. 34.26 + 29 =
35. 35.Half of 28 =
36. 36.23 × 6 =
37. 37.Best estimate of 54 × 36? (a) 20000 (b) 200 (c) 2000
38. 38.Double 59 =
39. 39.You buy a pencil box for ₹27 and a pen for ₹14. You pay with a ₹100 note. How much change do you get, in rupees?
40. 40.Best estimate of 502 + 376? (a) 700 (b) 900 (c) 1100

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