Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 864 · 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. 1.7 + 9 =
2. 2.23 + 47 =
3. 3.96 − 73 =
4. 4.73 + 31 =
5. 5.5% of ₹260 =
6. 6.82 + 45 =
7. 7.17 × 8 =
8. 8.56 + ? = 100
9. 9.684 ÷ 9 =
10. 10.Double 63 =
11. 11.1008 − 981 =
12. 12.A cricket match starts at 2:25 and the first innings ends at 5:00. How many minutes did the innings last?
13. 13.46 + 8 =
14. 14.62 × 4 =
15. 15.Half of 62 =
16. 16.19 + 8 =
17. 17.522 − 491 =
18. 18.720 − 99 =
19. 19.6 + 8 =
20. 20.49 + 2 =
21. 21.35 × 7 =
22. 22.57 laddoos are packed in boxes of 4. How many laddoos are left over?
23. 23.51 + 47 =
24. 24.10 + 12 =
25. 25.17 × 4 =
26. 26.7 + ? = 10
27. 27.You buy a kite for ₹40 and a pen for ₹12. You pay with a ₹100 note. How much change do you get, in rupees?
28. 28.Best estimate of 273 + 273? (a) 400 (b) 800 (c) 600
29. 29.What is the remainder when 74 is divided by 8?
30. 30.You buy a water bottle for ₹74 and pay with a ₹100 note. How much change do you get, in rupees?
31. 31.25² =
32. 32.17 + 18 =
33. 33.77 × 9 =
34. 34.42 + 71 =
35. 35.38 + 9 =
36. 36.54 + 15 =
37. 37.67 − 55 =
38. 38.204 ÷ 4 =
39. 39.256 ÷ 8 =
40. 40.You start your homework at 1:05 and finish at 3:15. How many minutes did you work?

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