Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 281 · 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.Double 39 =
2. 2.20 + 21 =
3. 3.A train leaves at 5:50 and reaches the next city at 7:45. How many minutes is the journey?
4. 4.16 + 9 =
5. 5.A train leaves at 8:25 and reaches the next city at 11:05. How many minutes is the journey?
6. 6.172 ÷ 4 =
7. 7.99 × 8 =
8. 8.13 + 14 =
9. 9.Best estimate of 78 × 91? (a) 7200 (b) 72000 (c) 720
10. 10.232 ÷ 8 =
11. 11.You buy a cricket ball for ₹76 and pay with a ₹100 note. How much change do you get, in rupees?
12. 12.58 × 5 =
13. 13.65 + 7 =
14. 14.Best estimate of 96 × 71? (a) 700 (b) 7000 (c) 70000
15. 15.56 × 3 =
16. 16.72 − 9 =
17. 17.8 + 7 =
18. 18.Best estimate of 86 × 49? (a) 450 (b) 45000 (c) 4500
19. 19.26² =
20. 20.92 ÷ 4 =
21. 21.290 − 99 =
22. 22.16² =
23. 23.357 ÷ 7 =
24. 24.61 − 47 =
25. 25.62 + 33 =
26. 26.21² =
27. 27.Best estimate of 82 × 89? (a) 72000 (b) 720 (c) 7200
28. 28.74 − 41 =
29. 29.176 ÷ 4 =
30. 30.80 + 29 =
31. 31.165 ÷ 3 =
32. 32.A train leaves at 3:45 and reaches the next city at 7:00. How many minutes is the journey?
33. 33.Half of 78 =
34. 34.Half of 76 =
35. 35.Double 57 =
36. 36.35 + 6 =
37. 37.48 + 49 =
38. 38.217 − 193 =
39. 39.You buy a bag of mangoes for ₹27 and pay with a ₹100 note. How much change do you get, in rupees?
40. 40.23² =

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