Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 243 · 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.Half of 164 =
2. 2.A train leaves at 4:10 and reaches the next city at 5:40. How many minutes is the journey?
3. 3.97 − 29 =
4. 4.232 ÷ 4 =
5. 5.144 ÷ 8 =
6. 6.Best estimate of 37 × 94? (a) 3600 (b) 36000 (c) 360
7. 7.58 + 9 =
8. 8.You start your homework at 8:10 and finish at 10:00. How many minutes did you work?
9. 9.21 + 23 =
10. 10.29 × 8 =
11. 11.19² =
12. 12.Best estimate of 589 + 520? (a) 1100 (b) 900 (c) 1300
13. 13.1018 − 996 =
14. 14.1007 − 993 =
15. 15.14 + 15 =
16. 16.Best estimate of 573 + 219? (a) 800 (b) 600 (c) 1000
17. 17.A train leaves at 5:30 and reaches the next city at 6:20. How many minutes is the journey?
18. 18.511 − 482 =
19. 19.25 + 24 =
20. 20.85 × 7 =
21. 21.23 × 4 =
22. 22.216 − 184 =
23. 23.728 ÷ 8 =
24. 24.You buy a box of crayons for ₹88 and pay with a ₹100 note. How much change do you get, in rupees?
25. 25.320 ÷ 8 =
26. 26.18 + ? = 100
27. 27.67 + ? = 100
28. 28.Best estimate of 40 × 79? (a) 3200 (b) 32000 (c) 320
29. 29.Double 98 =
30. 30.2 + ? = 10
31. 31.53 × 4 =
32. 32.98 − 41 =
33. 33.84 + ? = 100
34. 34.66 + 35 =
35. 35.You buy a storybook for ₹65 and pay with a ₹100 note. How much change do you get, in rupees?
36. 36.54 × 7 =
37. 37.33 + 9 =
38. 38.38 + 9 =
39. 39.45 + ? = 100
40. 40.Double 92 =

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