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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 592 · 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. 1.50 + 73 =
  2. 2.47 + 37 =
  3. 3.22 + 31 =
  4. 4.60 + 61 =
  5. 5.73 + 21 =
  6. 6.82 + 33 =
  7. 7.50 + 82 =
  8. 8.70 + 58 =
  9. 9.67 + 81 =
  10. 10.29 + 43 =
  11. 11.21 + 79 =
  12. 12.34 + 58 =
  13. 13.71 + 12 =
  14. 14.23 + 62 =
  15. 15.64 + 81 =
  16. 16.56 + 77 =
  17. 17.54 + 64 =
  18. 18.74 + 67 =
  19. 19.52 + 78 =
  20. 20.21 + 68 =
  21. 21.39 + 59 =
  22. 22.47 + 27 =
  23. 23.28 + 53 =
  24. 24.87 + 61 =
  25. 25.83 + 12 =
  26. 26.27 + 77 =
  27. 27.78 + 28 =
  28. 28.40 + 72 =
  29. 29.23 + 51 =
  30. 30.78 + 14 =
  31. 31.42 + 24 =
  32. 32.28 + 63 =
  33. 33.31 + 81 =
  34. 34.88 + 13 =
  35. 35.27 + 31 =
  36. 36.68 + 64 =
  37. 37.44 + 14 =
  38. 38.26 + 25 =
  39. 39.23 + 81 =
  40. 40.67 + 77 =

Answer key

  1. 123
  2. 84
  3. 53
  4. 121
  5. 94
  6. 115
  7. 132
  8. 128
  9. 148
  10. 72
  11. 100
  12. 92
  13. 83
  14. 85
  15. 145
  16. 133
  17. 118
  18. 141
  19. 130
  20. 89
  21. 98
  22. 74
  23. 81
  24. 148
  25. 95
  26. 104
  27. 106
  28. 112
  29. 74
  30. 92
  31. 66
  32. 91
  33. 112
  34. 101
  35. 58
  36. 132
  37. 58
  38. 51
  39. 104
  40. 144

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