Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 361 · 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 + 6 =
2. 2.Best estimate of 91 × 37? (a) 36000 (b) 360 (c) 3600
3. 3.71 + ? = 100
4. 4.76 + 7 =
5. 5.22 × 7 =
6. 6.66 + 8 =
7. 7.243 ÷ 9 =
8. 8.A train leaves at 4:30 and reaches the next city at 6:10. How many minutes is the journey?
9. 9.48 + ? = 100
10. 10.130 − 75 =
11. 11.Half of 26 =
12. 12.A cricket match starts at 1:00 and the first innings ends at 3:20. How many minutes did the innings last?
13. 13.46 + 7 =
14. 14.33 × 4 =
15. 15.Double 31 =
16. 16.You buy a box of crayons for ₹21 and a pen for ₹15. You pay with a ₹100 note. How much change do you get, in rupees?
17. 17.5% of ₹750 =
18. 18.Best estimate of 625 + 715? (a) 1500 (b) 1300 (c) 1100
19. 19.306 − 293 =
20. 20.34 − 9 =
21. 21.Best estimate of 79 × 22? (a) 160 (b) 1600 (c) 16000
22. 22.42 + 9 =
23. 23.31 × 7 =
24. 24.46 + 6 =
25. 25.A cricket match starts at 8:45 and the first innings ends at 11:30. How many minutes did the innings last?
26. 26.256 ÷ 8 =
27. 27.89 − 73 =
28. 28.567 ÷ 7 =
29. 29.3 + ? = 10
30. 30.Double 61 =
31. 31.5% of ₹580 =
32. 32.413 + 99 =
33. 33.340 ÷ 4 =
34. 34.Double 17 =
35. 35.31 + 13 =
36. 36.26 × 8 =
37. 37.50% of ₹890 =
38. 38.84 × 5 =
39. 39.40 × 8 =
40. 40.What is the remainder when 30 is divided by 7?

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