Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 742 · 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. 1.59 × 4 =
2. 2.Double 21 =
3. 3.89 × 7 =
4. 4.9 + 8 =
5. 5.14 + 13 =
6. 6.184 ÷ 8 =
7. 7.Best estimate of 74 × 62? (a) 420 (b) 4200 (c) 42000
8. 8.86 − 49 =
9. 9.61 + ? = 100
10. 10.You buy a box of crayons for ₹474 and pay with a ₹500 note. How much change do you get, in rupees?
11. 11.43 × 7 =
12. 12.58 + 53 =
13. 13.36 × 9 =
14. 14.Best estimate of 648 + 484? (a) 1100 (b) 900 (c) 1300
15. 15.132 ÷ 4 =
16. 16.75 + 34 =
17. 17.405 ÷ 5 =
18. 18.126 + 99 =
19. 19.10% of ₹440 =
20. 20.You buy a kite for ₹277 and pay with a ₹500 note. How much change do you get, in rupees?
21. 21.12 + 11 =
22. 22.Double 75 =
23. 23.You buy a kite for ₹39 and a pen for ₹41. You pay with a ₹100 note. How much change do you get, in rupees?
24. 24.113 children stand in rows of 8. How many full rows can they make?
25. 25.23 × 3 =
26. 26.28 + 5 =
27. 27.Double 68 =
28. 28.You buy a water bottle for ₹29 and a pen for ₹37. You pay with a ₹100 note. How much change do you get, in rupees?
29. 29.220 ÷ 4 =
30. 30.520 − 498 =
31. 31.56 + ? = 100
32. 32.31 × 7 =
33. 33.316 − 289 =
34. 34.Half of 56 =
35. 35.82 laddoos are packed in boxes of 8. How many laddoos are left over?
36. 36.76 + 42 =
37. 37.17 + 8 =
38. 38.5% of ₹540 =
39. 39.You buy a kite for ₹36 and a pen for ₹44. You pay with a ₹100 note. How much change do you get, in rupees?
40. 40.18 + 4 =

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