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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 729 · 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. 1.141 ÷ 3 =
  2. 2.You start your homework at 8:25 and finish at 10:10. How many minutes did you work?
  3. 3.Double 42 =
  4. 4.272 ÷ 8 =
  5. 5.59 + 47 =
  6. 6.Double 58 =
  7. 7.23 × 9 =
  8. 8.144 ÷ 8 =
  9. 9.63 − 49 =
  10. 10.29 × 5 =
  11. 11.Double 18 =
  12. 12.9 + 10 =
  13. 13.10 + 9 =
  14. 14.You buy a notebook for ₹16 and pay with a ₹100 note. How much change do you get, in rupees?
  15. 15.56 + 17 =
  16. 16.205 ÷ 5 =
  17. 17.42 + ? = 100
  18. 18.You buy a bag of mangoes for ₹18 and a pen for ₹23. You pay with a ₹100 note. How much change do you get, in rupees?
  19. 19.98 × 6 =
  20. 20.57 + ? = 100
  21. 21.7 + 8 =
  22. 22.220 ÷ 4 =
  23. 23.Double 37 =
  24. 24.52 − 33 =
  25. 25.504 ÷ 7 =
  26. 26.34 + 19 =
  27. 27.54 − 32 =
  28. 28.Best estimate of 515 + 249? (a) 900 (b) 700 (c) 500
  29. 29.8 + ? = 10
  30. 30.25 + 26 =
  31. 31.18 × 8 =
  32. 32.155 ÷ 5 =
  33. 33.4 + ? = 10
  34. 34.21 × 9 =
  35. 35.67 − 19 =
  36. 36.57 + 6 =
  37. 37.38 × 4 =
  38. 38.69 + 9 =
  39. 39.77 − 28 =
  40. 40.Best estimate of 490 + 392? (a) 1100 (b) 700 (c) 900

Answer key

  1. 47
  2. 105
  3. 84
  4. 34
  5. 106
  6. 116
  7. 207
  8. 18
  9. 14
  10. 145
  11. 36
  12. 19
  13. 19
  14. 84
  15. 73
  16. 41
  17. 58
  18. 59
  19. 588
  20. 43
  21. 15
  22. 55
  23. 74
  24. 19
  25. 72
  26. 53
  27. 22
  28. 700
  29. 2
  30. 51
  31. 144
  32. 31
  33. 6
  34. 189
  35. 48
  36. 63
  37. 152
  38. 78
  39. 49
  40. 900

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