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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 61 · 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.A train leaves at 3:40 and reaches the next city at 5:35. How many minutes is the journey?
  2. 2.Best estimate of 747 + 427? (a) 1300 (b) 1100 (c) 900
  3. 3.18² =
  4. 4.89 + 63 =
  5. 5.184 ÷ 8 =
  6. 6.59 × 4 =
  7. 7.Best estimate of 37 × 27? (a) 1200 (b) 12000 (c) 120
  8. 8.79 − 63 =
  9. 9.75 ÷ 5 =
  10. 10.180 ÷ 4 =
  11. 11.480 ÷ 5 =
  12. 12.35 × 4 =
  13. 13.80 − 52 =
  14. 14.Double 93 =
  15. 15.65 − 34 =
  16. 16.26 + 25 =
  17. 17.882 ÷ 9 =
  18. 18.A film starts at 4:05 and ends at 5:30. How many minutes long is the film?
  19. 19.79 + 3 =
  20. 20.14² =
  21. 21.316 ÷ 4 =
  22. 22.Best estimate of 12 × 89? (a) 9000 (b) 900 (c) 90
  23. 23.90 − 71 =
  24. 24.47 + 9 =
  25. 25.5 + 9 =
  26. 26.You buy a cricket ball for ₹209 and pay with a ₹500 note. How much change do you get, in rupees?
  27. 27.46 + 9 =
  28. 28.28 − 9 =
  29. 29.26² =
  30. 30.567 ÷ 7 =
  31. 31.22² =
  32. 32.26 + ? = 100
  33. 33.Half of 128 =
  34. 34.68 ÷ 4 =
  35. 35.57 + ? = 100
  36. 36.Best estimate of 320 + 204? (a) 300 (b) 500 (c) 700
  37. 37.40 × 4 =
  38. 38.17 + 4 =
  39. 39.31 × 8 =
  40. 40.89 + 15 =

Answer key

  1. 115
  2. 1100
  3. 324
  4. 152
  5. 23
  6. 236
  7. 1200
  8. 16
  9. 15
  10. 45
  11. 96
  12. 140
  13. 28
  14. 186
  15. 31
  16. 51
  17. 98
  18. 85
  19. 82
  20. 196
  21. 79
  22. 900
  23. 19
  24. 56
  25. 14
  26. 291
  27. 55
  28. 19
  29. 676
  30. 81
  31. 484
  32. 74
  33. 64
  34. 17
  35. 43
  36. 500
  37. 160
  38. 21
  39. 248
  40. 104

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