Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 809 · 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 78 × 56? (a) 4800 (b) 48000 (c) 480
2. 2.You start your homework at 1:35 and finish at 4:50. How many minutes did you work?
3. 3.12 × 8 =
4. 4.73 children stand in rows of 5. How many full rows can they make?
5. 5.52 + ? = 100
6. 6.6 + ? = 10
7. 7.16 × 4 =
8. 8.15² =
9. 9.8 + 4 =
10. 10.355 ÷ 5 =
11. 11.168 ÷ 7 =
12. 12.309 − 286 =
13. 13.446 + 99 =
14. 14.83 laddoos are packed in boxes of 8. How many laddoos are left over?
15. 15.37 laddoos are packed in boxes of 6. How many laddoos are left over?
16. 16.9 + ? = 10
17. 17.819 ÷ 9 =
18. 18.Best estimate of 500 + 228? (a) 900 (b) 500 (c) 700
19. 19.160 ÷ 4 =
20. 20.22 + 24 =
21. 21.36 + 8 =
22. 22.Best estimate of 13 × 30? (a) 30 (b) 3000 (c) 300
23. 23.86 children stand in rows of 9. How many full rows can they make?
24. 24.Double 16 =
25. 25.Best estimate of 92 × 62? (a) 54000 (b) 5400 (c) 540
26. 26.96 ÷ 8 =
27. 27.Double 68 =
28. 28.57 + 7 =
29. 29.30 + 73 =
30. 30.206 − 180 =
31. 31.87 + 8 =
32. 32.86 + 67 =
33. 33.70 + ? = 100
34. 34.Best estimate of 81 × 40? (a) 320 (b) 32000 (c) 3200
35. 35.You start your homework at 7:40 and finish at 10:25. How many minutes did you work?
36. 36.45 × 3 =
37. 37.75 + 19 =
38. 38.19² =
39. 39.14 × 8 =
40. 40.You buy a box of crayons for ₹31 and pay with a ₹100 note. How much change do you get, in rupees?

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