Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 221 · 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. 1.19 + 5 =
2. 2.15 × 4 =
3. 3.You start your homework at 6:10 and finish at 8:35. How many minutes did you work?
4. 4.75 × 4 =
5. 5.59 + 9 =
6. 6.86 + ? = 100
7. 7.6 + ? = 10
8. 8.26 + 9 =
9. 9.Double 58 =
10. 10.273 ÷ 3 =
11. 11.117 ÷ 9 =
12. 12.81 + ? = 100
13. 13.195 − 99 =
14. 14.57 − 44 =
15. 15.72 − 51 =
16. 16.28 + 31 =
17. 17.Best estimate of 293 + 738? (a) 800 (b) 1000 (c) 1200
18. 18.27 + 9 =
19. 19.16² =
20. 20.A train leaves at 3:10 and reaches the next city at 4:40. How many minutes is the journey?
21. 21.Double 78 =
22. 22.21² =
23. 23.15² =
24. 24.You start your homework at 8:30 and finish at 10:35. How many minutes did you work?
25. 25.Double 95 =
26. 26.Best estimate of 76 × 60? (a) 48000 (b) 480 (c) 4800
27. 27.Best estimate of 770 + 477? (a) 1100 (b) 1300 (c) 1500
28. 28.88 × 3 =
29. 29.120 − 83 =
30. 30.6 + 5 =
31. 31.89 + 85 =
32. 32.You buy a kite for ₹15 and pay with a ₹100 note. How much change do you get, in rupees?
33. 33.You buy a water bottle for ₹14 and a pen for ₹28. You pay with a ₹100 note. How much change do you get, in rupees?
34. 34.Best estimate of 26 × 47? (a) 15000 (b) 150 (c) 1500
35. 35.87 + 5 =
36. 36.41 × 3 =
37. 37.104 − 98 =
38. 38.51 − 9 =
39. 39.25% of ₹80 =
40. 40.87 + 9 =

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