Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 426 · 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 + ? = 100
2. 2.Best estimate of 29 × 43? (a) 120 (b) 12000 (c) 1200
3. 3.55 × 7 =
4. 4.Double 36 =
5. 5.67 + 7 =
6. 6.Best estimate of 69 × 64? (a) 4200 (b) 420 (c) 42000
7. 7.58 + 7 =
8. 8.You buy a bag of mangoes for ₹410 and pay with a ₹500 note. How much change do you get, in rupees?
9. 9.58 laddoos are packed in boxes of 9. How many laddoos are left over?
10. 10.14 + 15 =
11. 11.What is the remainder when 27 is divided by 4?
12. 12.26² =
13. 13.28² =
14. 14.You start your homework at 3:05 and finish at 4:20. How many minutes did you work?
15. 15.136 ÷ 8 =
16. 16.22² =
17. 17.22 × 8 =
18. 18.Best estimate of 589 + 451? (a) 1100 (b) 1300 (c) 900
19. 19.85 − 29 =
20. 20.79 + 83 =
21. 21.29 + 77 =
22. 22.A film starts at 8:30 and ends at 9:35. How many minutes long is the film?
23. 23.136 ÷ 4 =
24. 24.209 − 187 =
25. 25.51 + ? = 100
26. 26.21² =
27. 27.86 + 55 =
28. 28.24 − 19 =
29. 29.368 ÷ 8 =
30. 30.57 + 5 =
31. 31.10% of ₹90 =
32. 32.25% of ₹880 =
33. 33.240 ÷ 8 =
34. 34.70 + 9 =
35. 35.You buy a notebook for ₹15 and a pen for ₹16. You pay with a ₹100 note. How much change do you get, in rupees?
36. 36.13² =
37. 37.34 children stand in rows of 4. How many full rows can they make?
38. 38.19 + 2 =
39. 39.55 + 7 =
40. 40.25% of ₹100 =

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