Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 372 · 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. 1.51 + 19 =
2. 2.530 − 494 =
3. 3.Best estimate of 22 × 36? (a) 800 (b) 8000 (c) 80
4. 4.104 − 60 =
5. 5.51 × 4 =
6. 6.47 + ? = 100
7. 7.54 × 3 =
8. 8.12 × 9 =
9. 9.21² =
10. 10.72 − 44 =
11. 11.50% of ₹530 =
12. 12.You buy a cricket ball for ₹30 and pay with a ₹100 note. How much change do you get, in rupees?
13. 13.24 + ? = 100
14. 14.89 + 5 =
15. 15.55 + 7 =
16. 16.25² =
17. 17.16 + 15 =
18. 18.A train leaves at 4:55 and reaches the next city at 5:40. How many minutes is the journey?
19. 19.You buy a kite for ₹71 and pay with a ₹100 note. How much change do you get, in rupees?
20. 20.18 + 19 =
21. 21.Half of 156 =
22. 22.82 + 36 =
23. 23.70 ÷ 5 =
24. 24.30 + ? = 100
25. 25.196 ÷ 4 =
26. 26.5 + 7 =
27. 27.6 + ? = 10
28. 28.78 + 42 =
29. 29.9 + ? = 10
30. 30.104 ÷ 8 =
31. 31.Half of 148 =
32. 32.A cricket match starts at 5:45 and the first innings ends at 6:40. How many minutes did the innings last?
33. 33.What is the remainder when 31 is divided by 3?
34. 34.80 + 58 =
35. 35.Best estimate of 217 + 304? (a) 300 (b) 700 (c) 500
36. 36.You buy a box of crayons for ₹44 and a pen for ₹24. You pay with a ₹100 note. How much change do you get, in rupees?
37. 37.85 + 9 =
38. 38.24 × 4 =
39. 39.37 + 61 =
40. 40.You buy a notebook for ₹462 and pay with a ₹500 note. How much change do you get, in rupees?

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