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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 682 · 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. 1.84 + 62 =
  2. 2.40 + 23 =
  3. 3.44 + 15 =
  4. 4.87 + 33 =
  5. 5.76 + 52 =
  6. 6.89 + 61 =
  7. 7.45 + 27 =
  8. 8.28 + 15 =
  9. 9.44 + 73 =
  10. 10.21 + 43 =
  11. 11.43 + 51 =
  12. 12.39 + 44 =
  13. 13.48 + 54 =
  14. 14.61 + 32 =
  15. 15.86 + 21 =
  16. 16.32 + 35 =
  17. 17.23 + 79 =
  18. 18.60 + 84 =
  19. 19.25 + 53 =
  20. 20.68 + 27 =
  21. 21.50 + 71 =
  22. 22.69 + 26 =
  23. 23.22 + 81 =
  24. 24.63 + 71 =
  25. 25.71 + 19 =
  26. 26.56 + 71 =
  27. 27.89 + 29 =
  28. 28.42 + 75 =
  29. 29.39 + 19 =
  30. 30.55 + 75 =
  31. 31.84 + 19 =
  32. 32.58 + 42 =
  33. 33.55 + 48 =
  34. 34.78 + 88 =
  35. 35.51 + 87 =
  36. 36.30 + 53 =
  37. 37.27 + 27 =
  38. 38.27 + 66 =
  39. 39.34 + 59 =
  40. 40.53 + 84 =

Answer key

  1. 146
  2. 63
  3. 59
  4. 120
  5. 128
  6. 150
  7. 72
  8. 43
  9. 117
  10. 64
  11. 94
  12. 83
  13. 102
  14. 93
  15. 107
  16. 67
  17. 102
  18. 144
  19. 78
  20. 95
  21. 121
  22. 95
  23. 103
  24. 134
  25. 90
  26. 127
  27. 118
  28. 117
  29. 58
  30. 130
  31. 103
  32. 100
  33. 103
  34. 166
  35. 138
  36. 83
  37. 54
  38. 93
  39. 93
  40. 137

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