Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 350 · 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. 1.349 + 99 =
2. 2.13 + 12 =
3. 3.35 + 19 =
4. 4.107 − 89 =
5. 5.Best estimate of 673 + 410? (a) 1300 (b) 900 (c) 1100
6. 6.16 + 17 =
7. 7.You buy a water bottle for ₹248 and pay with a ₹500 note. How much change do you get, in rupees?
8. 8.You buy a kite for ₹370 and pay with a ₹500 note. How much change do you get, in rupees?
9. 9.48 + 41 =
10. 10.2 + ? = 10
11. 11.47 + 29 =
12. 12.14 + 9 =
13. 13.20 + 22 =
14. 14.75 − 62 =
15. 15.77 + 9 =
16. 16.18 + 20 =
17. 17.82 × 4 =
18. 18.76 − 58 =
19. 19.96 ÷ 4 =
20. 20.5% of ₹340 =
21. 21.A cricket match starts at 4:10 and the first innings ends at 6:25. How many minutes did the innings last?
22. 22.18 × 8 =
23. 23.28 + 29 =
24. 24.46 + 6 =
25. 25.55 + 8 =
26. 26.20 + 29 =
27. 27.110 children stand in rows of 8. How many full rows can they make?
28. 28.79 + 19 =
29. 29.283 − 99 =
30. 30.74 × 5 =
31. 31.71 − 39 =
32. 32.156 ÷ 4 =
33. 33.67 − 31 =
34. 34.34 + 31 =
35. 35.46 + ? = 100
36. 36.17 laddoos are packed in boxes of 3. How many laddoos are left over?
37. 37.You buy a bag of mangoes for ₹18 and a pen for ₹26. You pay with a ₹100 note. How much change do you get, in rupees?
38. 38.53 × 4 =
39. 39.You buy a cricket ball for ₹14 and pay with a ₹100 note. How much change do you get, in rupees?
40. 40.Double 65 =

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