Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 885 · 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.Best estimate of 785 + 160? (a) 800 (b) 1000 (c) 1200
2. 2.15 × 8 =
3. 3.54 − 28 =
4. 4.Best estimate of 79 × 19? (a) 1600 (b) 160 (c) 16000
5. 5.77 × 9 =
6. 6.You buy a box of crayons for ₹18 and pay with a ₹100 note. How much change do you get, in rupees?
7. 7.67 + 74 =
8. 8.280 ÷ 8 =
9. 9.65 × 3 =
10. 10.You buy a storybook for ₹25 and pay with a ₹100 note. How much change do you get, in rupees?
11. 11.You buy a cricket ball for ₹94 and pay with a ₹100 note. How much change do you get, in rupees?
12. 12.Half of 116 =
13. 13.59 − 31 =
14. 14.26² =
15. 15.What is the remainder when 35 is divided by 4?
16. 16.Best estimate of 80 × 28? (a) 2400 (b) 240 (c) 24000
17. 17.44 − 9 =
18. 18.19 × 4 =
19. 19.48 + 6 =
20. 20.6 + 5 =
21. 21.40 × 4 =
22. 22.You start your homework at 2:50 and finish at 4:55. How many minutes did you work?
23. 23.264 ÷ 3 =
24. 24.18 + 19 =
25. 25.85 children stand in rows of 8. How many full rows can they make?
26. 26.77 + 9 =
27. 27.You start your homework at 2:00 and finish at 5:00. How many minutes did you work?
28. 28.13 × 8 =
29. 29.240 ÷ 4 =
30. 30.81 laddoos are packed in boxes of 8. How many laddoos are left over?
31. 31.78 children stand in rows of 7. How many full rows can they make?
32. 32.4 + ? = 10
33. 33.45 laddoos are packed in boxes of 8. How many laddoos are left over?
34. 34.A cricket match starts at 1:10 and the first innings ends at 1:40. How many minutes did the innings last?
35. 35.41 + 32 =
36. 36.80 + 85 =
37. 37.28 + 29 =
38. 38.50% of ₹620 =
39. 39.14² =
40. 40.Best estimate of 81 × 66? (a) 56000 (b) 560 (c) 5600

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