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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 204 · 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. 1.15 + 14 =
  2. 2.16² =
  3. 3.You buy a box of crayons for ₹418 and pay with a ₹500 note. How much change do you get, in rupees?
  4. 4.37 + 6 =
  5. 5.89 + 8 =
  6. 6.12 + 13 =
  7. 7.123 − 75 =
  8. 8.16 × 4 =
  9. 9.18 × 3 =
  10. 10.78 − 9 =
  11. 11.18² =
  12. 12.14² =
  13. 13.29 × 6 =
  14. 14.77 + 4 =
  15. 15.Best estimate of 384 + 742? (a) 1100 (b) 1300 (c) 900
  16. 16.19² =
  17. 17.Best estimate of 82 × 36? (a) 320 (b) 32000 (c) 3200
  18. 18.42 + 68 =
  19. 19.29 laddoos are packed in boxes of 5. How many laddoos are left over?
  20. 20.Half of 184 =
  21. 21.95 − 24 =
  22. 22.56 − 18 =
  23. 23.84 − 34 =
  24. 24.304 − 296 =
  25. 25.64 + 9 =
  26. 26.44 children stand in rows of 7. How many full rows can they make?
  27. 27.38 + 24 =
  28. 28.208 ÷ 4 =
  29. 29.15 × 4 =
  30. 30.61 − 15 =
  31. 31.You start your homework at 8:55 and finish at 12:10. How many minutes did you work?
  32. 32.53 − 26 =
  33. 33.28 + 7 =
  34. 34.15 × 8 =
  35. 35.91 − 16 =
  36. 36.459 ÷ 9 =
  37. 37.96 ÷ 8 =
  38. 38.280 ÷ 8 =
  39. 39.159 ÷ 3 =
  40. 40.373 + 99 =

Answer key

  1. 29
  2. 256
  3. 82
  4. 43
  5. 97
  6. 25
  7. 48
  8. 64
  9. 54
  10. 69
  11. 324
  12. 196
  13. 174
  14. 81
  15. 1100
  16. 361
  17. 3200
  18. 110
  19. 4
  20. 92
  21. 71
  22. 38
  23. 50
  24. 8
  25. 73
  26. 6
  27. 62
  28. 52
  29. 60
  30. 46
  31. 195
  32. 27
  33. 35
  34. 120
  35. 75
  36. 51
  37. 12
  38. 35
  39. 53
  40. 472

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