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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 36 · 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. 1.84 + 47 =
  2. 2.84 + 71 =
  3. 3.58 + 68 =
  4. 4.22 + 79 =
  5. 5.56 + 52 =
  6. 6.46 + 33 =
  7. 7.32 + 36 =
  8. 8.30 + 47 =
  9. 9.47 + 73 =
  10. 10.25 + 81 =
  11. 11.79 + 72 =
  12. 12.79 + 66 =
  13. 13.85 + 51 =
  14. 14.28 + 71 =
  15. 15.36 + 71 =
  16. 16.78 + 72 =
  17. 17.74 + 63 =
  18. 18.35 + 19 =
  19. 19.22 + 23 =
  20. 20.44 + 22 =
  21. 21.89 + 45 =
  22. 22.64 + 62 =
  23. 23.47 + 32 =
  24. 24.27 + 45 =
  25. 25.39 + 62 =
  26. 26.88 + 29 =
  27. 27.50 + 66 =
  28. 28.23 + 59 =
  29. 29.36 + 21 =
  30. 30.21 + 45 =
  31. 31.34 + 46 =
  32. 32.59 + 78 =
  33. 33.82 + 32 =
  34. 34.21 + 72 =
  35. 35.29 + 62 =
  36. 36.21 + 58 =
  37. 37.37 + 14 =
  38. 38.40 + 44 =
  39. 39.22 + 28 =
  40. 40.79 + 69 =

Answer key

  1. 131
  2. 155
  3. 126
  4. 101
  5. 108
  6. 79
  7. 68
  8. 77
  9. 120
  10. 106
  11. 151
  12. 145
  13. 136
  14. 99
  15. 107
  16. 150
  17. 137
  18. 54
  19. 45
  20. 66
  21. 134
  22. 126
  23. 79
  24. 72
  25. 101
  26. 117
  27. 116
  28. 82
  29. 57
  30. 66
  31. 80
  32. 137
  33. 114
  34. 93
  35. 91
  36. 79
  37. 51
  38. 84
  39. 50
  40. 148

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