Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 593 · 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. 1.35 × 4 =
2. 2.Double 28 =
3. 3.Half of 92 =
4. 4.Best estimate of 81 × 63? (a) 4800 (b) 480 (c) 48000
5. 5.Best estimate of 34 × 46? (a) 15000 (b) 1500 (c) 150
6. 6.Double 35 =
7. 7.3 + ? = 10
8. 8.8 + 10 =
9. 9.6 + ? = 10
10. 10.You start your homework at 8:15 and finish at 10:50. How many minutes did you work?
11. 11.64 + ? = 100
12. 12.88 + 37 =
13. 13.65 − 27 =
14. 14.41 + ? = 100
15. 15.10 + 9 =
16. 16.Double 95 =
17. 17.72 − 29 =
18. 18.You buy a bag of mangoes for ₹26 and pay with a ₹100 note. How much change do you get, in rupees?
19. 19.22 + 21 =
20. 20.What is the remainder when 42 is divided by 4?
21. 21.38 + ? = 100
22. 22.Double 56 =
23. 23.312 − 283 =
24. 24.220 − 181 =
25. 25.Double 49 =
26. 26.519 − 481 =
27. 27.26 + ? = 100
28. 28.42 × 8 =
29. 29.A train leaves at 6:20 and reaches the next city at 6:55. How many minutes is the journey?
30. 30.Double 71 =
31. 31.188 ÷ 4 =
32. 32.84 − 66 =
33. 33.20 + 29 =
34. 34.64 ÷ 4 =
35. 35.12 × 9 =
36. 36.25% of ₹300 =
37. 37.98 − 29 =
38. 38.101 − 29 =
39. 39.Best estimate of 81 × 57? (a) 48000 (b) 4800 (c) 480
40. 40.104 ÷ 4 =

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