Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 917 · 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. 1.28 + 73 =
2. 2.204 ÷ 3 =
3. 3.28 + 27 =
4. 4.111 − 86 =
5. 5.What is the remainder when 19 is divided by 4?
6. 6.47 + 24 =
7. 7.319 − 281 =
8. 8.Best estimate of 251 + 462? (a) 1000 (b) 600 (c) 800
9. 9.4 + ? = 10
10. 10.Best estimate of 120 + 338? (a) 600 (b) 200 (c) 400
11. 11.Best estimate of 123 + 773? (a) 1100 (b) 900 (c) 700
12. 12.26 × 8 =
13. 13.79 × 9 =
14. 14.Double 28 =
15. 15.17 + 16 =
16. 16.240 ÷ 4 =
17. 17.96 − 68 =
18. 18.59 − 46 =
19. 19.69 − 49 =
20. 20.512 − 99 =
21. 21.25 + 27 =
22. 22.14² =
23. 23.43 × 6 =
24. 24.514 − 486 =
25. 25.217 ÷ 7 =
26. 26.758 + 99 =
27. 27.523 − 480 =
28. 28.29 × 8 =
29. 29.21² =
30. 30.Best estimate of 26 × 90? (a) 27000 (b) 2700 (c) 270
31. 31.10 + 12 =
32. 32.Best estimate of 57 × 96? (a) 600 (b) 6000 (c) 60000
33. 33.23 + 24 =
34. 34.A train leaves at 1:45 and reaches the next city at 2:10. How many minutes is the journey?
35. 35.69 + ? = 100
36. 36.53 − 29 =
37. 37.68 × 4 =
38. 38.You buy a kite for ₹29 and a pen for ₹41. You pay with a ₹100 note. How much change do you get, in rupees?
39. 39.39 × 8 =
40. 40.Best estimate of 217 + 621? (a) 600 (b) 800 (c) 1000

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