Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 402 · 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. 1.79 − 62 =
2. 2.Best estimate of 51 × 98? (a) 5000 (b) 500 (c) 50000
3. 3.19 + 7 =
4. 4.12² =
5. 5.144 ÷ 8 =
6. 6.34 × 9 =
7. 7.16 + 7 =
8. 8.56 × 8 =
9. 9.38 + 9 =
10. 10.120 ÷ 8 =
11. 11.867 − 99 =
12. 12.28² =
13. 13.74 × 7 =
14. 14.45 + ? = 100
15. 15.66 + 5 =
16. 16.21 × 8 =
17. 17.45 + 44 =
18. 18.9 + 11 =
19. 19.76 × 9 =
20. 20.528 − 494 =
21. 21.476 + 99 =
22. 22.What is the remainder when 52 is divided by 9?
23. 23.14 + 13 =
24. 24.Best estimate of 94 × 70? (a) 63000 (b) 630 (c) 6300
25. 25.Half of 70 =
26. 26.A train leaves at 5:05 and reaches the next city at 6:10. How many minutes is the journey?
27. 27.You buy a notebook for ₹30 and a pen for ₹12. You pay with a ₹100 note. How much change do you get, in rupees?
28. 28.19² =
29. 29.96 ÷ 8 =
30. 30.5% of ₹200 =
31. 31.27² =
32. 32.317 − 276 =
33. 33.Half of 172 =
34. 34.46 laddoos are packed in boxes of 3. How many laddoos are left over?
35. 35.75 + 9 =
36. 36.64 × 7 =
37. 37.Double 58 =
38. 38.A cricket match starts at 1:20 and the first innings ends at 4:40. How many minutes did the innings last?
39. 39.Half of 198 =
40. 40.60 + 29 =

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