Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 945 · 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. 1.22 + 21 =
2. 2.73 × 5 =
3. 3.89 + ? = 100
4. 4.192 ÷ 3 =
5. 5.Best estimate of 50 × 31? (a) 1500 (b) 150 (c) 15000
6. 6.13 + 12 =
7. 7.73 + ? = 100
8. 8.5% of ₹240 =
9. 9.Best estimate of 96 × 16? (a) 20000 (b) 2000 (c) 200
10. 10.51 − 36 =
11. 11.144 ÷ 6 =
12. 12.46 + ? = 100
13. 13.Half of 184 =
14. 14.243 ÷ 3 =
15. 15.110 − 75 =
16. 16.108 ÷ 3 =
17. 17.34 + ? = 100
18. 18.52 × 4 =
19. 19.19² =
20. 20.23² =
21. 21.38 + 6 =
22. 22.13 × 3 =
23. 23.75 + 7 =
24. 24.36 × 8 =
25. 25.38 × 5 =
26. 26.What is the remainder when 122 is divided by 8?
27. 27.57 × 8 =
28. 28.You buy a box of crayons for ₹169 and pay with a ₹500 note. How much change do you get, in rupees?
29. 29.224 ÷ 4 =
30. 30.You buy a cricket ball for ₹20 and a pen for ₹14. You pay with a ₹100 note. How much change do you get, in rupees?
31. 31.Best estimate of 18 × 96? (a) 2000 (b) 200 (c) 20000
32. 32.76 + 37 =
33. 33.Double 64 =
34. 34.12² =
35. 35.65 − 46 =
36. 36.Double 39 =
37. 37.523 − 494 =
38. 38.50% of ₹70 =
39. 39.You buy a notebook for ₹201 and pay with a ₹500 note. How much change do you get, in rupees?
40. 40.What is the remainder when 118 is divided by 8?

Free mental maths lessons, practice and worksheets at talentjr.in/mental-maths