Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 546 · 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. 1.222 − 183 =
2. 2.26 + 6 =
3. 3.20 + 22 =
4. 4.18 + 7 =
5. 5.376 ÷ 8 =
6. 6.Best estimate of 63 × 77? (a) 4800 (b) 480 (c) 48000
7. 7.29 × 4 =
8. 8.50% of ₹850 =
9. 9.62 − 29 =
10. 10.27 − 9 =
11. 11.29² =
12. 12.Best estimate of 23 × 59? (a) 1200 (b) 12000 (c) 120
13. 13.You buy a kite for ₹362 and pay with a ₹500 note. How much change do you get, in rupees?
14. 14.Best estimate of 22 × 83? (a) 1600 (b) 16000 (c) 160
15. 15.Best estimate of 30 × 86? (a) 270 (b) 2700 (c) 27000
16. 16.59 + 8 =
17. 17.93 − 74 =
18. 18.77 + 14 =
19. 19.89 + ? = 100
20. 20.25 + 6 =
21. 21.What is the remainder when 44 is divided by 7?
22. 22.7 + 9 =
23. 23.76 − 19 =
24. 24.Best estimate of 575 + 749? (a) 1100 (b) 1300 (c) 1500
25. 25.7 + 8 =
26. 26.58 × 4 =
27. 27.122 − 83 =
28. 28.121 laddoos are packed in boxes of 8. How many laddoos are left over?
29. 29.Half of 76 =
30. 30.27 − 19 =
31. 31.26 + 8 =
32. 32.897 − 99 =
33. 33.68 + 9 =
34. 34.19² =
35. 35.Double 81 =
36. 36.65 × 4 =
37. 37.You buy a box of crayons for ₹386 and pay with a ₹500 note. How much change do you get, in rupees?
38. 38.Double 86 =
39. 39.236 ÷ 4 =
40. 40.68 + 19 =

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