Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 637 · 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. 1.56 + 7 =
2. 2.88 + 82 =
3. 3.1 + ? = 10
4. 4.Best estimate of 74 × 73? (a) 490 (b) 49000 (c) 4900
5. 5.16 × 4 =
6. 6.47 laddoos are packed in boxes of 6. How many laddoos are left over?
7. 7.Best estimate of 79 × 39? (a) 32000 (b) 3200 (c) 320
8. 8.60 + 9 =
9. 9.28 × 8 =
10. 10.11² =
11. 11.69 + 9 =
12. 12.21 + ? = 100
13. 13.240 ÷ 8 =
14. 14.8 + 5 =
15. 15.72 − 36 =
16. 16.Double 65 =
17. 17.28² =
18. 18.284 ÷ 4 =
19. 19.You buy a water bottle for ₹51 and pay with a ₹100 note. How much change do you get, in rupees?
20. 20.Half of 30 =
21. 21.You buy a kite for ₹33 and a pen for ₹40. You pay with a ₹100 note. How much change do you get, in rupees?
22. 22.27 + 7 =
23. 23.208 − 195 =
24. 24.160 + 99 =
25. 25.What is the remainder when 22 is divided by 3?
26. 26.43 × 4 =
27. 27.80 laddoos are packed in boxes of 6. How many laddoos are left over?
28. 28.What is the remainder when 47 is divided by 6?
29. 29.51 + 19 =
30. 30.A film starts at 7:20 and ends at 8:00. How many minutes long is the film?
31. 31.Half of 154 =
32. 32.Best estimate of 44 × 90? (a) 36000 (b) 360 (c) 3600
33. 33.10% of ₹290 =
34. 34.1001 − 997 =
35. 35.280 ÷ 8 =
36. 36.79 + 7 =
37. 37.You start your homework at 1:10 and finish at 4:20. How many minutes did you work?
38. 38.36 × 9 =
39. 39.48 ÷ 4 =
40. 40.9 + 11 =

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