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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 212 · 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. 1.48 + 53 =
  2. 2.28 + 64 =
  3. 3.29 + 41 =
  4. 4.44 + 58 =
  5. 5.26 + 33 =
  6. 6.83 + 75 =
  7. 7.72 + 47 =
  8. 8.60 + 13 =
  9. 9.39 + 51 =
  10. 10.46 + 52 =
  11. 11.23 + 22 =
  12. 12.63 + 21 =
  13. 13.73 + 75 =
  14. 14.50 + 27 =
  15. 15.89 + 26 =
  16. 16.74 + 81 =
  17. 17.80 + 12 =
  18. 18.64 + 23 =
  19. 19.83 + 31 =
  20. 20.86 + 13 =
  21. 21.77 + 51 =
  22. 22.63 + 32 =
  23. 23.81 + 72 =
  24. 24.49 + 58 =
  25. 25.89 + 24 =
  26. 26.25 + 37 =
  27. 27.61 + 87 =
  28. 28.71 + 89 =
  29. 29.45 + 29 =
  30. 30.54 + 55 =
  31. 31.82 + 84 =
  32. 32.53 + 54 =
  33. 33.41 + 22 =
  34. 34.75 + 66 =
  35. 35.80 + 41 =
  36. 36.80 + 35 =
  37. 37.85 + 25 =
  38. 38.34 + 43 =
  39. 39.30 + 51 =
  40. 40.88 + 67 =

Answer key

  1. 101
  2. 92
  3. 70
  4. 102
  5. 59
  6. 158
  7. 119
  8. 73
  9. 90
  10. 98
  11. 45
  12. 84
  13. 148
  14. 77
  15. 115
  16. 155
  17. 92
  18. 87
  19. 114
  20. 99
  21. 128
  22. 95
  23. 153
  24. 107
  25. 113
  26. 62
  27. 148
  28. 160
  29. 74
  30. 109
  31. 166
  32. 107
  33. 63
  34. 141
  35. 121
  36. 115
  37. 110
  38. 77
  39. 81
  40. 155

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