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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 136 · 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. 1.59 + 28 =
  2. 2.75 + 87 =
  3. 3.31 + 47 =
  4. 4.65 + 29 =
  5. 5.29 + 19 =
  6. 6.77 + 88 =
  7. 7.29 + 71 =
  8. 8.35 + 48 =
  9. 9.36 + 12 =
  10. 10.63 + 31 =
  11. 11.61 + 35 =
  12. 12.33 + 67 =
  13. 13.24 + 27 =
  14. 14.87 + 72 =
  15. 15.57 + 83 =
  16. 16.33 + 29 =
  17. 17.58 + 31 =
  18. 18.47 + 57 =
  19. 19.44 + 28 =
  20. 20.21 + 89 =
  21. 21.26 + 85 =
  22. 22.71 + 37 =
  23. 23.26 + 46 =
  24. 24.46 + 88 =
  25. 25.85 + 72 =
  26. 26.86 + 33 =
  27. 27.38 + 64 =
  28. 28.39 + 64 =
  29. 29.29 + 64 =
  30. 30.26 + 61 =
  31. 31.79 + 33 =
  32. 32.84 + 31 =
  33. 33.61 + 34 =
  34. 34.44 + 29 =
  35. 35.47 + 16 =
  36. 36.37 + 67 =
  37. 37.80 + 48 =
  38. 38.88 + 29 =
  39. 39.69 + 14 =
  40. 40.79 + 68 =

Answer key

  1. 87
  2. 162
  3. 78
  4. 94
  5. 48
  6. 165
  7. 100
  8. 83
  9. 48
  10. 94
  11. 96
  12. 100
  13. 51
  14. 159
  15. 140
  16. 62
  17. 89
  18. 104
  19. 72
  20. 110
  21. 111
  22. 108
  23. 72
  24. 134
  25. 157
  26. 119
  27. 102
  28. 103
  29. 93
  30. 87
  31. 112
  32. 115
  33. 95
  34. 73
  35. 63
  36. 104
  37. 128
  38. 117
  39. 83
  40. 147

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