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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 489 · 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. 1.88 + 61 =
  2. 2.79 + 69 =
  3. 3.84 + 76 =
  4. 4.50 + 27 =
  5. 5.66 + 73 =
  6. 6.41 + 32 =
  7. 7.75 + 39 =
  8. 8.64 + 23 =
  9. 9.32 + 47 =
  10. 10.31 + 61 =
  11. 11.49 + 85 =
  12. 12.28 + 12 =
  13. 13.60 + 58 =
  14. 14.30 + 71 =
  15. 15.24 + 51 =
  16. 16.88 + 37 =
  17. 17.25 + 41 =
  18. 18.57 + 83 =
  19. 19.48 + 54 =
  20. 20.42 + 34 =
  21. 21.76 + 32 =
  22. 22.36 + 29 =
  23. 23.56 + 27 =
  24. 24.29 + 32 =
  25. 25.30 + 32 =
  26. 26.23 + 67 =
  27. 27.36 + 13 =
  28. 28.42 + 57 =
  29. 29.33 + 72 =
  30. 30.83 + 67 =
  31. 31.21 + 12 =
  32. 32.46 + 42 =
  33. 33.73 + 47 =
  34. 34.56 + 19 =
  35. 35.31 + 62 =
  36. 36.64 + 58 =
  37. 37.86 + 33 =
  38. 38.24 + 21 =
  39. 39.29 + 87 =
  40. 40.38 + 26 =

Answer key

  1. 149
  2. 148
  3. 160
  4. 77
  5. 139
  6. 73
  7. 114
  8. 87
  9. 79
  10. 92
  11. 134
  12. 40
  13. 118
  14. 101
  15. 75
  16. 125
  17. 66
  18. 140
  19. 102
  20. 76
  21. 108
  22. 65
  23. 83
  24. 61
  25. 62
  26. 90
  27. 49
  28. 99
  29. 105
  30. 150
  31. 33
  32. 88
  33. 120
  34. 75
  35. 93
  36. 122
  37. 119
  38. 45
  39. 116
  40. 64

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