Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 68 · 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. 1.25% of ₹650 =
2. 2.65 × 4 =
3. 3.You buy a box of crayons for ₹60 and pay with a ₹100 note. How much change do you get, in rupees?
4. 4.Best estimate of 40 × 61? (a) 240 (b) 2400 (c) 24000
5. 5.51 − 9 =
6. 6.Best estimate of 216 + 182? (a) 600 (b) 200 (c) 400
7. 7.87 + 6 =
8. 8.20 × 8 =
9. 9.53 × 4 =
10. 10.122 − 89 =
11. 11.You start your homework at 3:35 and finish at 6:15. How many minutes did you work?
12. 12.Half of 30 =
13. 13.Half of 176 =
14. 14.Best estimate of 80 × 56? (a) 48000 (b) 4800 (c) 480
15. 15.27 children stand in rows of 5. How many full rows can they make?
16. 16.1026 − 979 =
17. 17.51 × 7 =
18. 18.Best estimate of 738 + 827? (a) 1500 (b) 1700 (c) 1300
19. 19.22² =
20. 20.23 + 24 =
21. 21.50% of ₹330 =
22. 22.15 + 14 =
23. 23.68 × 8 =
24. 24.53 − 19 =
25. 25.67 − 43 =
26. 26.Best estimate of 48 × 49? (a) 250 (b) 2500 (c) 25000
27. 27.28 + 27 =
28. 28.Half of 38 =
29. 29.You start your homework at 8:25 and finish at 11:35. How many minutes did you work?
30. 30.54 laddoos are packed in boxes of 5. How many laddoos are left over?
31. 31.You buy a kite for ₹20 and a pen for ₹18. You pay with a ₹100 note. How much change do you get, in rupees?
32. 32.64 ÷ 4 =
33. 33.13 × 8 =
34. 34.5% of ₹510 =
35. 35.68 + ? = 100
36. 36.You buy a bag of mangoes for ₹464 and pay with a ₹500 note. How much change do you get, in rupees?
37. 37.25 × 5 =
38. 38.22 + 23 =
39. 39.594 ÷ 6 =
40. 40.A cricket match starts at 2:40 and the first innings ends at 5:40. How many minutes did the innings last?

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