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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 669 · 40 questions
TalentJR

How to do it in your head (Tens first): Keep the first number as it is. Add the tens of the second number. Add the ones.

NameDateTime takenScore ___ / 40
  1. 1.27 + 47 =
  2. 2.54 + 41 =
  3. 3.40 + 41 =
  4. 4.67 + 64 =
  5. 5.53 + 35 =
  6. 6.40 + 31 =
  7. 7.38 + 17 =
  8. 8.45 + 47 =
  9. 9.47 + 41 =
  10. 10.69 + 25 =
  11. 11.59 + 23 =
  12. 12.71 + 33 =
  13. 13.89 + 31 =
  14. 14.46 + 59 =
  15. 15.50 + 26 =
  16. 16.31 + 13 =
  17. 17.24 + 18 =
  18. 18.45 + 55 =
  19. 19.22 + 27 =
  20. 20.22 + 37 =
  21. 21.64 + 64 =
  22. 22.32 + 31 =
  23. 23.87 + 29 =
  24. 24.53 + 56 =
  25. 25.52 + 56 =
  26. 26.66 + 29 =
  27. 27.48 + 38 =
  28. 28.54 + 15 =
  29. 29.70 + 75 =
  30. 30.75 + 13 =
  31. 31.48 + 31 =
  32. 32.60 + 78 =
  33. 33.74 + 17 =
  34. 34.21 + 35 =
  35. 35.73 + 27 =
  36. 36.85 + 61 =
  37. 37.21 + 37 =
  38. 38.55 + 44 =
  39. 39.35 + 21 =
  40. 40.88 + 28 =

Answer key

  1. 74
  2. 95
  3. 81
  4. 131
  5. 88
  6. 71
  7. 55
  8. 92
  9. 88
  10. 94
  11. 82
  12. 104
  13. 120
  14. 105
  15. 76
  16. 44
  17. 42
  18. 100
  19. 49
  20. 59
  21. 128
  22. 63
  23. 116
  24. 109
  25. 108
  26. 95
  27. 86
  28. 69
  29. 145
  30. 88
  31. 79
  32. 138
  33. 91
  34. 56
  35. 100
  36. 146
  37. 58
  38. 99
  39. 56
  40. 116

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