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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 746 · 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. 1.38 + 66 =
  2. 2.81 + 68 =
  3. 3.82 + 77 =
  4. 4.38 + 15 =
  5. 5.33 + 49 =
  6. 6.38 + 57 =
  7. 7.88 + 29 =
  8. 8.85 + 36 =
  9. 9.63 + 24 =
  10. 10.37 + 87 =
  11. 11.23 + 56 =
  12. 12.53 + 18 =
  13. 13.65 + 34 =
  14. 14.34 + 22 =
  15. 15.44 + 19 =
  16. 16.33 + 81 =
  17. 17.35 + 12 =
  18. 18.69 + 82 =
  19. 19.49 + 58 =
  20. 20.87 + 31 =
  21. 21.45 + 31 =
  22. 22.63 + 13 =
  23. 23.42 + 41 =
  24. 24.75 + 61 =
  25. 25.57 + 83 =
  26. 26.22 + 34 =
  27. 27.49 + 66 =
  28. 28.25 + 87 =
  29. 29.55 + 87 =
  30. 30.66 + 21 =
  31. 31.36 + 72 =
  32. 32.51 + 68 =
  33. 33.88 + 27 =
  34. 34.27 + 67 =
  35. 35.30 + 68 =
  36. 36.54 + 72 =
  37. 37.35 + 38 =
  38. 38.82 + 34 =
  39. 39.69 + 83 =
  40. 40.59 + 13 =

Answer key

  1. 104
  2. 149
  3. 159
  4. 53
  5. 82
  6. 95
  7. 117
  8. 121
  9. 87
  10. 124
  11. 79
  12. 71
  13. 99
  14. 56
  15. 63
  16. 114
  17. 47
  18. 151
  19. 107
  20. 118
  21. 76
  22. 76
  23. 83
  24. 136
  25. 140
  26. 56
  27. 115
  28. 112
  29. 142
  30. 87
  31. 108
  32. 119
  33. 115
  34. 94
  35. 98
  36. 126
  37. 73
  38. 116
  39. 152
  40. 72

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