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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 566 · 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. 1.31 + 21 =
  2. 2.79 + 15 =
  3. 3.26 + 32 =
  4. 4.70 + 37 =
  5. 5.33 + 61 =
  6. 6.33 + 24 =
  7. 7.70 + 79 =
  8. 8.43 + 78 =
  9. 9.50 + 47 =
  10. 10.88 + 42 =
  11. 11.49 + 51 =
  12. 12.27 + 44 =
  13. 13.32 + 42 =
  14. 14.79 + 82 =
  15. 15.52 + 67 =
  16. 16.69 + 67 =
  17. 17.69 + 54 =
  18. 18.46 + 33 =
  19. 19.29 + 14 =
  20. 20.28 + 57 =
  21. 21.49 + 77 =
  22. 22.77 + 46 =
  23. 23.31 + 19 =
  24. 24.31 + 39 =
  25. 25.41 + 71 =
  26. 26.51 + 21 =
  27. 27.53 + 84 =
  28. 28.71 + 57 =
  29. 29.47 + 34 =
  30. 30.83 + 79 =
  31. 31.70 + 32 =
  32. 32.72 + 33 =
  33. 33.48 + 24 =
  34. 34.41 + 31 =
  35. 35.79 + 45 =
  36. 36.76 + 89 =
  37. 37.58 + 82 =
  38. 38.73 + 75 =
  39. 39.80 + 23 =
  40. 40.37 + 45 =

Answer key

  1. 52
  2. 94
  3. 58
  4. 107
  5. 94
  6. 57
  7. 149
  8. 121
  9. 97
  10. 130
  11. 100
  12. 71
  13. 74
  14. 161
  15. 119
  16. 136
  17. 123
  18. 79
  19. 43
  20. 85
  21. 126
  22. 123
  23. 50
  24. 70
  25. 112
  26. 72
  27. 137
  28. 128
  29. 81
  30. 162
  31. 102
  32. 105
  33. 72
  34. 72
  35. 124
  36. 165
  37. 140
  38. 148
  39. 103
  40. 82

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