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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 522 · 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. 1.23 + 22 =
  2. 2.Double 87 =
  3. 3.88 + 3 =
  4. 4.69 + 8 =
  5. 5.6 + ? = 10
  6. 6.Best estimate of 795 + 844? (a) 1800 (b) 1400 (c) 1600
  7. 7.46 + 7 =
  8. 8.37 + 7 =
  9. 9.28² =
  10. 10.27 + 6 =
  11. 11.Double 64 =
  12. 12.93 − 19 =
  13. 13.You buy a notebook for ₹68 and pay with a ₹100 note. How much change do you get, in rupees?
  14. 14.82 × 3 =
  15. 15.62 − 47 =
  16. 16.236 ÷ 4 =
  17. 17.73 + 9 =
  18. 18.Best estimate of 710 + 226? (a) 700 (b) 900 (c) 1100
  19. 19.Double 24 =
  20. 20.21 laddoos are packed in boxes of 5. How many laddoos are left over?
  21. 21.Half of 68 =
  22. 22.64 − 31 =
  23. 23.48 + 42 =
  24. 24.17 + 9 =
  25. 25.86 + 5 =
  26. 26.89 × 3 =
  27. 27.8 + ? = 10
  28. 28.9 + ? = 10
  29. 29.69 + 38 =
  30. 30.117 ÷ 9 =
  31. 31.Best estimate of 785 + 398? (a) 1000 (b) 1200 (c) 1400
  32. 32.23 + 24 =
  33. 33.95 × 8 =
  34. 34.66 × 4 =
  35. 35.310 − 280 =
  36. 36.13 × 3 =
  37. 37.67 − 19 =
  38. 38.395 + 99 =
  39. 39.29² =
  40. 40.You buy a cricket ball for ₹35 and a pen for ₹21. You pay with a ₹100 note. How much change do you get, in rupees?

Answer key

  1. 45
  2. 174
  3. 91
  4. 77
  5. 4
  6. 1600
  7. 53
  8. 44
  9. 784
  10. 33
  11. 128
  12. 74
  13. 32
  14. 246
  15. 15
  16. 59
  17. 82
  18. 900
  19. 48
  20. 1
  21. 34
  22. 33
  23. 90
  24. 26
  25. 91
  26. 267
  27. 2
  28. 1
  29. 107
  30. 13
  31. 1200
  32. 47
  33. 760
  34. 264
  35. 30
  36. 39
  37. 48
  38. 494
  39. 841
  40. 44

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