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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 900 · 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.Half of 62 =
  2. 2.44 + 87 =
  3. 3.98 − 35 =
  4. 4.39 × 9 =
  5. 5.92 − 71 =
  6. 6.693 ÷ 7 =
  7. 7.Best estimate of 551 + 484? (a) 1100 (b) 900 (c) 1300
  8. 8.83 − 68 =
  9. 9.77 children stand in rows of 8. How many full rows can they make?
  10. 10.31 × 5 =
  11. 11.21² =
  12. 12.104 − 73 =
  13. 13.307 − 283 =
  14. 14.85 + 29 =
  15. 15.33 + ? = 100
  16. 16.Double 31 =
  17. 17.24² =
  18. 18.12² =
  19. 19.72 + 84 =
  20. 20.123 ÷ 3 =
  21. 21.11 + ? = 100
  22. 22.49 laddoos are packed in boxes of 6. How many laddoos are left over?
  23. 23.161 ÷ 7 =
  24. 24.24 + 25 =
  25. 25.104 − 91 =
  26. 26.Half of 52 =
  27. 27.217 − 194 =
  28. 28.34 children stand in rows of 7. How many full rows can they make?
  29. 29.231 ÷ 7 =
  30. 30.Double 79 =
  31. 31.Double 29 =
  32. 32.67 + 29 =
  33. 33.Double 84 =
  34. 34.19 + 18 =
  35. 35.Double 55 =
  36. 36.7 + ? = 10
  37. 37.89 + ? = 100
  38. 38.503 − 481 =
  39. 39.524 − 487 =
  40. 40.31 + ? = 100

Answer key

  1. 31
  2. 131
  3. 63
  4. 351
  5. 21
  6. 99
  7. 1100
  8. 15
  9. 9
  10. 155
  11. 441
  12. 31
  13. 24
  14. 114
  15. 67
  16. 62
  17. 576
  18. 144
  19. 156
  20. 41
  21. 89
  22. 1
  23. 23
  24. 49
  25. 13
  26. 26
  27. 23
  28. 4
  29. 33
  30. 158
  31. 58
  32. 96
  33. 168
  34. 37
  35. 110
  36. 3
  37. 11
  38. 22
  39. 37
  40. 69

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