Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 669 · 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 + 68 =
2. 2.30 + 31 =
3. 3.71 − 19 =
4. 4.48 + 71 =
5. 5.138 laddoos are packed in boxes of 9. How many laddoos are left over?
6. 6.4 + ? = 10
7. 7.Half of 124 =
8. 8.85 − 58 =
9. 9.26 + 7 =
10. 10.What is the remainder when 33 is divided by 4?
11. 11.70 − 29 =
12. 12.You buy a kite for ₹72 and pay with a ₹100 note. How much change do you get, in rupees?
13. 13.17² =
14. 14.14 + 15 =
15. 15.Best estimate of 30 × 94? (a) 2700 (b) 270 (c) 27000
16. 16.What is the remainder when 39 is divided by 5?
17. 17.You buy a bag of mangoes for ₹62 and pay with a ₹100 note. How much change do you get, in rupees?
18. 18.6 + 5 =
19. 19.9 + ? = 10
20. 20.52 + ? = 100
21. 21.39 × 8 =
22. 22.280 ÷ 8 =
23. 23.71 × 4 =
24. 24.Best estimate of 175 + 816? (a) 1200 (b) 800 (c) 1000
25. 25.11² =
26. 26.11 + ? = 100
27. 27.20 × 4 =
28. 28.15 × 4 =
29. 29.64 − 47 =
30. 30.110 − 67 =
31. 31.6 + 8 =
32. 32.42 + 39 =
33. 33.43 × 9 =
34. 34.You buy a pencil box for ₹30 and a pen for ₹34. You pay with a ₹100 note. How much change do you get, in rupees?
35. 35.57 + 21 =
36. 36.50% of ₹480 =
37. 37.5% of ₹50 =
38. 38.43 × 4 =
39. 39.68 ÷ 4 =
40. 40.Double 58 =

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