Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 70 · 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. 1.6 + ? = 10
2. 2.65 + 8 =
3. 3.You buy a box of crayons for ₹76 and pay with a ₹100 note. How much change do you get, in rupees?
4. 4.20 + ? = 100
5. 5.96 ÷ 4 =
6. 6.28² =
7. 7.1002 − 990 =
8. 8.78 − 43 =
9. 9.Half of 134 =
10. 10.12 × 8 =
11. 11.25% of ₹750 =
12. 12.86 + 6 =
13. 13.5% of ₹280 =
14. 14.684 − 99 =
15. 15.Best estimate of 877 + 213? (a) 1100 (b) 1300 (c) 900
16. 16.80 ÷ 4 =
17. 17.315 ÷ 5 =
18. 18.63 − 21 =
19. 19.Best estimate of 56 × 90? (a) 540 (b) 54000 (c) 5400
20. 20.35 + 58 =
21. 21.31 children stand in rows of 4. How many full rows can they make?
22. 22.13 + 12 =
23. 23.15² =
24. 24.You buy a box of crayons for ₹43 and a pen for ₹22. You pay with a ₹100 note. How much change do you get, in rupees?
25. 25.322 − 296 =
26. 26.371 ÷ 7 =
27. 27.What is the remainder when 68 is divided by 5?
28. 28.81 × 4 =
29. 29.12 + 19 =
30. 30.272 ÷ 8 =
31. 31.108 ÷ 6 =
32. 32.23² =
33. 33.232 ÷ 8 =
34. 34.You buy a bag of mangoes for ₹278 and pay with a ₹500 note. How much change do you get, in rupees?
35. 35.12 + 11 =
36. 36.56 − 38 =
37. 37.28 + 27 =
38. 38.11² =
39. 39.17 laddoos are packed in boxes of 3. How many laddoos are left over?
40. 40.84 − 41 =

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