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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 668 · 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. 1.88 + 55 =
  2. 2.78 + 79 =
  3. 3.85 + 41 =
  4. 4.85 + 63 =
  5. 5.58 + 17 =
  6. 6.58 + 69 =
  7. 7.67 + 15 =
  8. 8.54 + 34 =
  9. 9.61 + 17 =
  10. 10.43 + 35 =
  11. 11.52 + 58 =
  12. 12.27 + 42 =
  13. 13.71 + 58 =
  14. 14.65 + 37 =
  15. 15.22 + 88 =
  16. 16.80 + 54 =
  17. 17.56 + 68 =
  18. 18.68 + 64 =
  19. 19.71 + 68 =
  20. 20.43 + 23 =
  21. 21.38 + 44 =
  22. 22.87 + 34 =
  23. 23.48 + 72 =
  24. 24.47 + 67 =
  25. 25.47 + 83 =
  26. 26.81 + 36 =
  27. 27.29 + 65 =
  28. 28.24 + 41 =
  29. 29.45 + 58 =
  30. 30.22 + 17 =
  31. 31.44 + 63 =
  32. 32.33 + 85 =
  33. 33.48 + 42 =
  34. 34.40 + 85 =
  35. 35.82 + 12 =
  36. 36.48 + 29 =
  37. 37.81 + 88 =
  38. 38.51 + 82 =
  39. 39.83 + 42 =
  40. 40.54 + 37 =

Answer key

  1. 143
  2. 157
  3. 126
  4. 148
  5. 75
  6. 127
  7. 82
  8. 88
  9. 78
  10. 78
  11. 110
  12. 69
  13. 129
  14. 102
  15. 110
  16. 134
  17. 124
  18. 132
  19. 139
  20. 66
  21. 82
  22. 121
  23. 120
  24. 114
  25. 130
  26. 117
  27. 94
  28. 65
  29. 103
  30. 39
  31. 107
  32. 118
  33. 90
  34. 125
  35. 94
  36. 77
  37. 169
  38. 133
  39. 125
  40. 91

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