Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 979 · 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. 1.21² =
2. 2.12² =
3. 3.Best estimate of 261 + 744? (a) 1200 (b) 800 (c) 1000
4. 4.27 × 4 =
5. 5.201 ÷ 3 =
6. 6.224 ÷ 8 =
7. 7.A cricket match starts at 6:45 and the first innings ends at 8:05. How many minutes did the innings last?
8. 8.31 − 19 =
9. 9.50% of ₹640 =
10. 10.209 − 193 =
11. 11.36 + 54 =
12. 12.108 ÷ 9 =
13. 13.73 + 19 =
14. 14.222 − 193 =
15. 15.144 ÷ 4 =
16. 16.72 + 39 =
17. 17.80 + 29 =
18. 18.You buy a bag of mangoes for ₹297 and pay with a ₹500 note. How much change do you get, in rupees?
19. 19.You buy a notebook for ₹316 and pay with a ₹500 note. How much change do you get, in rupees?
20. 20.Best estimate of 798 + 836? (a) 1400 (b) 1800 (c) 1600
21. 21.Double 85 =
22. 22.17 + 18 =
23. 23.Double 66 =
24. 24.65 × 4 =
25. 25.24 × 4 =
26. 26.79 × 6 =
27. 27.39 + 2 =
28. 28.81 + ? = 100
29. 29.504 ÷ 7 =
30. 30.Best estimate of 70 × 42? (a) 2800 (b) 280 (c) 28000
31. 31.Half of 28 =
32. 32.Double 69 =
33. 33.Double 43 =
34. 34.Double 71 =
35. 35.You start your homework at 4:30 and finish at 6:50. How many minutes did you work?
36. 36.750 + 99 =
37. 37.A cricket match starts at 3:40 and the first innings ends at 4:50. How many minutes did the innings last?
38. 38.104 ÷ 4 =
39. 39.25% of ₹530 =
40. 40.1020 − 981 =

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