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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 679 · 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. 1.83 + 46 =
  2. 2.80 + 61 =
  3. 3.35 + 81 =
  4. 4.37 + 83 =
  5. 5.25 + 14 =
  6. 6.78 + 32 =
  7. 7.22 + 67 =
  8. 8.40 + 51 =
  9. 9.51 + 64 =
  10. 10.43 + 81 =
  11. 11.73 + 49 =
  12. 12.85 + 48 =
  13. 13.59 + 67 =
  14. 14.32 + 69 =
  15. 15.31 + 71 =
  16. 16.76 + 46 =
  17. 17.74 + 86 =
  18. 18.27 + 15 =
  19. 19.61 + 51 =
  20. 20.71 + 52 =
  21. 21.30 + 37 =
  22. 22.66 + 66 =
  23. 23.30 + 21 =
  24. 24.25 + 55 =
  25. 25.33 + 73 =
  26. 26.68 + 27 =
  27. 27.85 + 42 =
  28. 28.89 + 63 =
  29. 29.48 + 61 =
  30. 30.62 + 33 =
  31. 31.84 + 45 =
  32. 32.30 + 68 =
  33. 33.50 + 31 =
  34. 34.68 + 79 =
  35. 35.44 + 17 =
  36. 36.63 + 84 =
  37. 37.60 + 81 =
  38. 38.36 + 35 =
  39. 39.49 + 31 =
  40. 40.68 + 66 =

Answer key

  1. 129
  2. 141
  3. 116
  4. 120
  5. 39
  6. 110
  7. 89
  8. 91
  9. 115
  10. 124
  11. 122
  12. 133
  13. 126
  14. 101
  15. 102
  16. 122
  17. 160
  18. 42
  19. 112
  20. 123
  21. 67
  22. 132
  23. 51
  24. 80
  25. 106
  26. 95
  27. 127
  28. 152
  29. 109
  30. 95
  31. 129
  32. 98
  33. 81
  34. 147
  35. 61
  36. 147
  37. 141
  38. 71
  39. 80
  40. 134

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