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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 66 · 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. 1.80 + 47 =
  2. 2.33 + 41 =
  3. 3.22 + 34 =
  4. 4.25 + 72 =
  5. 5.46 + 22 =
  6. 6.37 + 25 =
  7. 7.50 + 52 =
  8. 8.41 + 31 =
  9. 9.63 + 36 =
  10. 10.59 + 12 =
  11. 11.83 + 18 =
  12. 12.88 + 22 =
  13. 13.47 + 72 =
  14. 14.58 + 59 =
  15. 15.80 + 33 =
  16. 16.84 + 51 =
  17. 17.58 + 67 =
  18. 18.88 + 36 =
  19. 19.81 + 59 =
  20. 20.25 + 31 =
  21. 21.76 + 43 =
  22. 22.67 + 64 =
  23. 23.49 + 13 =
  24. 24.62 + 42 =
  25. 25.35 + 87 =
  26. 26.28 + 59 =
  27. 27.57 + 81 =
  28. 28.63 + 22 =
  29. 29.50 + 63 =
  30. 30.24 + 83 =
  31. 31.47 + 67 =
  32. 32.32 + 23 =
  33. 33.45 + 63 =
  34. 34.46 + 18 =
  35. 35.61 + 14 =
  36. 36.81 + 29 =
  37. 37.81 + 82 =
  38. 38.52 + 35 =
  39. 39.71 + 56 =
  40. 40.88 + 41 =

Answer key

  1. 127
  2. 74
  3. 56
  4. 97
  5. 68
  6. 62
  7. 102
  8. 72
  9. 99
  10. 71
  11. 101
  12. 110
  13. 119
  14. 117
  15. 113
  16. 135
  17. 125
  18. 124
  19. 140
  20. 56
  21. 119
  22. 131
  23. 62
  24. 104
  25. 122
  26. 87
  27. 138
  28. 85
  29. 113
  30. 107
  31. 114
  32. 55
  33. 108
  34. 64
  35. 75
  36. 110
  37. 163
  38. 87
  39. 127
  40. 129

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