Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 688 · 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. 1.86 + 5 =
2. 2.13² =
3. 3.What is the remainder when 21 is divided by 4?
4. 4.1 + ? = 10
5. 5.502 − 498 =
6. 6.391 + 99 =
7. 7.You buy a box of crayons for ₹196 and pay with a ₹500 note. How much change do you get, in rupees?
8. 8.You start your homework at 6:15 and finish at 8:45. How many minutes did you work?
9. 9.Double 28 =
10. 10.What is the remainder when 74 is divided by 8?
11. 11.93 − 24 =
12. 12.61 × 3 =
13. 13.80 − 48 =
14. 14.460 ÷ 5 =
15. 15.76 − 62 =
16. 16.23 + 25 =
17. 17.12 × 8 =
18. 18.90 − 19 =
19. 19.Double 27 =
20. 20.Best estimate of 669 + 364? (a) 1300 (b) 1100 (c) 900
21. 21.50% of ₹820 =
22. 22.229 − 187 =
23. 23.You buy a bag of mangoes for ₹30 and a pen for ₹23. You pay with a ₹100 note. How much change do you get, in rupees?
24. 24.122 laddoos are packed in boxes of 8. How many laddoos are left over?
25. 25.80 + 9 =
26. 26.65 − 12 =
27. 27.74 + 24 =
28. 28.53 − 17 =
29. 29.66 × 9 =
30. 30.32 + 78 =
31. 31.Double 92 =
32. 32.35 + 6 =
33. 33.558 ÷ 9 =
34. 34.28 + 8 =
35. 35.72 children stand in rows of 7. How many full rows can they make?
36. 36.A cricket match starts at 5:05 and the first innings ends at 7:50. How many minutes did the innings last?
37. 37.12 × 4 =
38. 38.A cricket match starts at 3:20 and the first innings ends at 4:00. How many minutes did the innings last?
39. 39.61 × 4 =
40. 40.77 − 58 =

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