Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 100 · 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.You buy a kite for ₹24 and a pen for ₹32. You pay with a ₹100 note. How much change do you get, in rupees?
2. 2.What is the remainder when 89 is divided by 8?
3. 3.Best estimate of 877 + 144? (a) 800 (b) 1200 (c) 1000
4. 4.You buy a cricket ball for ₹15 and a pen for ₹31. You pay with a ₹100 note. How much change do you get, in rupees?
5. 5.23 + 14 =
6. 6.31 − 19 =
7. 7.73 − 55 =
8. 8.9 + 3 =
9. 9.50% of ₹900 =
10. 10.783 − 99 =
11. 11.512 − 497 =
12. 12.72 − 19 =
13. 13.Double 47 =
14. 14.58 + 7 =
15. 15.81 + 89 =
16. 16.75 + 7 =
17. 17.225 ÷ 5 =
18. 18.You buy a cricket ball for ₹16 and a pen for ₹38. You pay with a ₹100 note. How much change do you get, in rupees?
19. 19.105 − 82 =
20. 20.22 + 23 =
21. 21.10% of ₹120 =
22. 22.65 + 31 =
23. 23.42 + 63 =
24. 24.518 − 496 =
25. 25.195 ÷ 5 =
26. 26.41 − 29 =
27. 27.85 + 6 =
28. 28.22² =
29. 29.41 children stand in rows of 5. How many full rows can they make?
30. 30.72 × 5 =
31. 31.51 + 41 =
32. 32.5% of ₹110 =
33. 33.Half of 104 =
34. 34.284 + 99 =
35. 35.24 + ? = 100
36. 36.2 + ? = 10
37. 37.25% of ₹650 =
38. 38.59 − 16 =
39. 39.58 × 4 =
40. 40.Best estimate of 20 × 66? (a) 1400 (b) 14000 (c) 140

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