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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 89 · 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. 1.70 × 4 =
  2. 2.39 + 61 =
  3. 3.83 + ? = 100
  4. 4.56 + 51 =
  5. 5.208 − 185 =
  6. 6.64 × 4 =
  7. 7.102 − 29 =
  8. 8.14 + 13 =
  9. 9.136 ÷ 8 =
  10. 10.31 + 19 =
  11. 11.7 + 4 =
  12. 12.116 ÷ 4 =
  13. 13.Best estimate of 50 × 87? (a) 4500 (b) 450 (c) 45000
  14. 14.6 + 8 =
  15. 15.10 + 12 =
  16. 16.256 ÷ 8 =
  17. 17.74 × 6 =
  18. 18.28 + 29 =
  19. 19.160 ÷ 4 =
  20. 20.A cricket match starts at 4:45 and the first innings ends at 5:35. How many minutes did the innings last?
  21. 21.32 + ? = 100
  22. 22.77 + 75 =
  23. 23.96 ÷ 8 =
  24. 24.33 × 8 =
  25. 25.120 ÷ 8 =
  26. 26.58 × 8 =
  27. 27.61 − 28 =
  28. 28.9 + 3 =
  29. 29.A cricket match starts at 4:35 and the first innings ends at 6:00. How many minutes did the innings last?
  30. 30.186 ÷ 6 =
  31. 31.16² =
  32. 32.2 + ? = 10
  33. 33.18 × 8 =
  34. 34.45 + 6 =
  35. 35.A cricket match starts at 8:20 and the first innings ends at 11:00. How many minutes did the innings last?
  36. 36.94 − 52 =
  37. 37.88 ÷ 8 =
  38. 38.76 + 14 =
  39. 39.62 + 23 =
  40. 40.What is the remainder when 20 is divided by 3?

Answer key

  1. 280
  2. 100
  3. 17
  4. 107
  5. 23
  6. 256
  7. 73
  8. 27
  9. 17
  10. 50
  11. 11
  12. 29
  13. 4500
  14. 14
  15. 22
  16. 32
  17. 444
  18. 57
  19. 40
  20. 50
  21. 68
  22. 152
  23. 12
  24. 264
  25. 15
  26. 464
  27. 33
  28. 12
  29. 85
  30. 31
  31. 256
  32. 8
  33. 144
  34. 51
  35. 160
  36. 42
  37. 11
  38. 90
  39. 85
  40. 2

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