Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 818 · 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. 1.70 − 48 =
2. 2.64 × 4 =
3. 3.205 − 194 =
4. 4.288 ÷ 8 =
5. 5.You buy a kite for ₹163 and pay with a ₹500 note. How much change do you get, in rupees?
6. 6.125 − 85 =
7. 7.19 + ? = 100
8. 8.28² =
9. 9.Half of 98 =
10. 10.You buy a bag of mangoes for ₹29 and a pen for ₹42. You pay with a ₹100 note. How much change do you get, in rupees?
11. 11.You buy a kite for ₹29 and pay with a ₹100 note. How much change do you get, in rupees?
12. 12.65 × 4 =
13. 13.What is the remainder when 67 is divided by 9?
14. 14.51 × 3 =
15. 15.27 + 29 =
16. 16.87 + 8 =
17. 17.13² =
18. 18.122 − 79 =
19. 19.10% of ₹630 =
20. 20.12 × 8 =
21. 21.You buy a water bottle for ₹20 and a pen for ₹41. You pay with a ₹100 note. How much change do you get, in rupees?
22. 22.5% of ₹70 =
23. 23.100 ÷ 4 =
24. 24.23² =
25. 25.Double 99 =
26. 26.19² =
27. 27.20 + 21 =
28. 28.Best estimate of 56 × 73? (a) 42000 (b) 4200 (c) 420
29. 29.72 − 9 =
30. 30.53 + 19 =
31. 31.124 ÷ 4 =
32. 32.646 − 99 =
33. 33.30 + 29 =
34. 34.19 laddoos are packed in boxes of 4. How many laddoos are left over?
35. 35.93 × 4 =
36. 36.39 + ? = 100
37. 37.50% of ₹670 =
38. 38.Double 36 =
39. 39.46 + ? = 100
40. 40.What is the remainder when 51 is divided by 5?

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