Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 661 · 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. 1.41 + 9 =
2. 2.27 + ? = 100
3. 3.Best estimate of 73 × 46? (a) 35000 (b) 3500 (c) 350
4. 4.51 × 6 =
5. 5.22 × 5 =
6. 6.48 + 7 =
7. 7.98 − 22 =
8. 8.Best estimate of 822 + 582? (a) 1600 (b) 1400 (c) 1200
9. 9.52 − 12 =
10. 10.12 + 9 =
11. 11.116 ÷ 4 =
12. 12.1 + ? = 10
13. 13.You buy a box of crayons for ₹18 and a pen for ₹19. You pay with a ₹100 note. How much change do you get, in rupees?
14. 14.435 ÷ 5 =
15. 15.88 + 42 =
16. 16.47 + 7 =
17. 17.50% of ₹290 =
18. 18.Double 51 =
19. 19.88 − 13 =
20. 20.35 + 55 =
21. 21.57 + 67 =
22. 22.Best estimate of 702 + 765? (a) 1700 (b) 1500 (c) 1300
23. 23.50 + 44 =
24. 24.51 − 29 =
25. 25.440 ÷ 8 =
26. 26.61 − 19 =
27. 27.59 × 5 =
28. 28.104 ÷ 4 =
29. 29.232 ÷ 4 =
30. 30.19 + ? = 100
31. 31.You buy a notebook for ₹44 and a pen for ₹33. You pay with a ₹100 note. How much change do you get, in rupees?
32. 32.5% of ₹250 =
33. 33.2 + ? = 10
34. 34.Best estimate of 693 + 298? (a) 1000 (b) 800 (c) 1200
35. 35.Double 92 =
36. 36.43 × 4 =
37. 37.10% of ₹610 =
38. 38.What is the remainder when 65 is divided by 7?
39. 39.A cricket match starts at 1:25 and the first innings ends at 2:00. How many minutes did the innings last?
40. 40.249 ÷ 3 =

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