← Mixed mental challenge lesson New set →

Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 579 · 40 questions
TalentJR

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.

NameDateTime takenScore ___ / 40
  1. 1.25% of ₹430 =
  2. 2.Double 69 =
  3. 3.35 × 9 =
  4. 4.50 + 18 =
  5. 5.You start your homework at 4:10 and finish at 4:40. How many minutes did you work?
  6. 6.83 − 61 =
  7. 7.29² =
  8. 8.88 ÷ 8 =
  9. 9.61 − 9 =
  10. 10.128 ÷ 8 =
  11. 11.62 + 69 =
  12. 12.144 ÷ 4 =
  13. 13.315 − 292 =
  14. 14.17 + 19 =
  15. 15.31 × 8 =
  16. 16.188 ÷ 4 =
  17. 17.Best estimate of 19 × 16? (a) 40 (b) 4000 (c) 400
  18. 18.10% of ₹500 =
  19. 19.83 × 4 =
  20. 20.76 + 7 =
  21. 21.49 − 29 =
  22. 22.Best estimate of 141 + 331? (a) 400 (b) 200 (c) 600
  23. 23.198 ÷ 9 =
  24. 24.47 + 31 =
  25. 25.Double 54 =
  26. 26.Best estimate of 77 × 34? (a) 24000 (b) 240 (c) 2400
  27. 27.14² =
  28. 28.352 ÷ 4 =
  29. 29.53 − 39 =
  30. 30.17 + 7 =
  31. 31.78 ÷ 6 =
  32. 32.28² =
  33. 33.747 + 99 =
  34. 34.82 + 61 =
  35. 35.76 × 4 =
  36. 36.You buy a cricket ball for ₹72 and pay with a ₹100 note. How much change do you get, in rupees?
  37. 37.6 + ? = 10
  38. 38.89 − 16 =
  39. 39.13² =
  40. 40.51 + 61 =

Answer key

  1. 107.5
  2. 138
  3. 315
  4. 68
  5. 30
  6. 22
  7. 841
  8. 11
  9. 52
  10. 16
  11. 131
  12. 36
  13. 23
  14. 36
  15. 248
  16. 47
  17. 400
  18. 50
  19. 332
  20. 83
  21. 20
  22. 400
  23. 22
  24. 78
  25. 108
  26. 2400
  27. 196
  28. 88
  29. 14
  30. 24
  31. 13
  32. 784
  33. 846
  34. 143
  35. 304
  36. 28
  37. 4
  38. 73
  39. 169
  40. 112

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