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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 670 · 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. 1.86 + 37 =
  2. 2.28 + 72 =
  3. 3.31 + 19 =
  4. 4.35 + 39 =
  5. 5.44 + 83 =
  6. 6.78 + 18 =
  7. 7.47 + 39 =
  8. 8.57 + 22 =
  9. 9.33 + 71 =
  10. 10.80 + 85 =
  11. 11.53 + 71 =
  12. 12.79 + 35 =
  13. 13.68 + 23 =
  14. 14.43 + 19 =
  15. 15.61 + 32 =
  16. 16.27 + 32 =
  17. 17.88 + 47 =
  18. 18.81 + 23 =
  19. 19.69 + 77 =
  20. 20.78 + 12 =
  21. 21.43 + 55 =
  22. 22.25 + 81 =
  23. 23.87 + 33 =
  24. 24.80 + 73 =
  25. 25.81 + 21 =
  26. 26.65 + 17 =
  27. 27.38 + 55 =
  28. 28.40 + 57 =
  29. 29.47 + 51 =
  30. 30.35 + 25 =
  31. 31.54 + 49 =
  32. 32.46 + 88 =
  33. 33.55 + 79 =
  34. 34.82 + 36 =
  35. 35.43 + 49 =
  36. 36.28 + 26 =
  37. 37.57 + 23 =
  38. 38.22 + 64 =
  39. 39.70 + 13 =
  40. 40.70 + 88 =

Answer key

  1. 123
  2. 100
  3. 50
  4. 74
  5. 127
  6. 96
  7. 86
  8. 79
  9. 104
  10. 165
  11. 124
  12. 114
  13. 91
  14. 62
  15. 93
  16. 59
  17. 135
  18. 104
  19. 146
  20. 90
  21. 98
  22. 106
  23. 120
  24. 153
  25. 102
  26. 82
  27. 93
  28. 97
  29. 98
  30. 60
  31. 103
  32. 134
  33. 134
  34. 118
  35. 92
  36. 54
  37. 80
  38. 86
  39. 83
  40. 158

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