Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 851 · 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. 1.121 − 83 =
2. 2.Best estimate of 56 × 56? (a) 36000 (b) 3600 (c) 360
3. 3.26 + 5 =
4. 4.89 + ? = 100
5. 5.765 ÷ 9 =
6. 6.23 + 24 =
7. 7.33 × 9 =
8. 8.36 + 52 =
9. 9.45 laddoos are packed in boxes of 8. How many laddoos are left over?
10. 10.A cricket match starts at 6:10 and the first innings ends at 7:55. How many minutes did the innings last?
11. 11.70 + ? = 100
12. 12.44 × 5 =
13. 13.161 ÷ 7 =
14. 14.5 + ? = 10
15. 15.82 + 37 =
16. 16.212 − 185 =
17. 17.20 + 21 =
18. 18.86 + 56 =
19. 19.You buy a box of crayons for ₹94 and pay with a ₹100 note. How much change do you get, in rupees?
20. 20.33 laddoos are packed in boxes of 4. How many laddoos are left over?
21. 21.123 − 91 =
22. 22.5% of ₹80 =
23. 23.86 − 19 =
24. 24.13 + ? = 100
25. 25.68 + 19 =
26. 26.39 + 27 =
27. 27.50% of ₹490 =
28. 28.You buy a box of crayons for ₹39 and a pen for ₹16. You pay with a ₹100 note. How much change do you get, in rupees?
29. 29.57 × 4 =
30. 30.87 + 29 =
31. 31.You buy a cricket ball for ₹34 and a pen for ₹19. You pay with a ₹100 note. How much change do you get, in rupees?
32. 32.You buy a box of crayons for ₹309 and pay with a ₹500 note. How much change do you get, in rupees?
33. 33.82 − 21 =
34. 34.16 + 9 =
35. 35.432 ÷ 8 =
36. 36.13 × 3 =
37. 37.79 − 59 =
38. 38.217 ÷ 7 =
39. 39.You buy a kite for ₹130 and pay with a ₹500 note. How much change do you get, in rupees?
40. 40.506 − 491 =

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