Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 496 · 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. 1.47 + 36 =
2. 2.80 − 67 =
3. 3.12 + 14 =
4. 4.You start your homework at 4:10 and finish at 7:05. How many minutes did you work?
5. 5.7 + ? = 10
6. 6.58 − 21 =
7. 7.63 + ? = 100
8. 8.56 − 21 =
9. 9.95 × 9 =
10. 10.75 − 36 =
11. 11.80 − 56 =
12. 12.79 + 57 =
13. 13.55 laddoos are packed in boxes of 6. How many laddoos are left over?
14. 14.Double 21 =
15. 15.64 + 9 =
16. 16.A train leaves at 2:10 and reaches the next city at 4:25. How many minutes is the journey?
17. 17.Best estimate of 27 × 31? (a) 90 (b) 9000 (c) 900
18. 18.Double 29 =
19. 19.56 − 44 =
20. 20.27 × 8 =
21. 21.530 − 481 =
22. 22.79 + 2 =
23. 23.67 + 9 =
24. 24.26 + ? = 100
25. 25.52 − 47 =
26. 26.827 − 99 =
27. 27.45 + 29 =
28. 28.You buy a storybook for ₹82 and pay with a ₹100 note. How much change do you get, in rupees?
29. 29.24 + ? = 100
30. 30.59 − 34 =
31. 31.3 + ? = 10
32. 32.79 + 8 =
33. 33.7 + 9 =
34. 34.You buy a storybook for ₹15 and pay with a ₹100 note. How much change do you get, in rupees?
35. 35.17² =
36. 36.29 + 31 =
37. 37.1029 − 985 =
38. 38.134 children stand in rows of 9. How many full rows can they make?
39. 39.You buy a storybook for ₹19 and a pen for ₹13. You pay with a ₹100 note. How much change do you get, in rupees?
40. 40.18 − 9 =

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