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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 325 · 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. 1.67 + 83 =
  2. 2.23 + 81 =
  3. 3.75 + 42 =
  4. 4.85 + 32 =
  5. 5.42 + 63 =
  6. 6.49 + 73 =
  7. 7.69 + 31 =
  8. 8.48 + 17 =
  9. 9.36 + 75 =
  10. 10.31 + 64 =
  11. 11.84 + 51 =
  12. 12.41 + 65 =
  13. 13.39 + 51 =
  14. 14.22 + 67 =
  15. 15.89 + 15 =
  16. 16.89 + 27 =
  17. 17.84 + 25 =
  18. 18.34 + 17 =
  19. 19.68 + 71 =
  20. 20.43 + 85 =
  21. 21.86 + 86 =
  22. 22.74 + 52 =
  23. 23.50 + 14 =
  24. 24.46 + 33 =
  25. 25.63 + 62 =
  26. 26.72 + 13 =
  27. 27.77 + 21 =
  28. 28.32 + 16 =
  29. 29.47 + 41 =
  30. 30.89 + 49 =
  31. 31.80 + 68 =
  32. 32.78 + 26 =
  33. 33.25 + 25 =
  34. 34.28 + 73 =
  35. 35.64 + 46 =
  36. 36.85 + 56 =
  37. 37.57 + 31 =
  38. 38.87 + 84 =
  39. 39.51 + 71 =
  40. 40.29 + 73 =

Answer key

  1. 150
  2. 104
  3. 117
  4. 117
  5. 105
  6. 122
  7. 100
  8. 65
  9. 111
  10. 95
  11. 135
  12. 106
  13. 90
  14. 89
  15. 104
  16. 116
  17. 109
  18. 51
  19. 139
  20. 128
  21. 172
  22. 126
  23. 64
  24. 79
  25. 125
  26. 85
  27. 98
  28. 48
  29. 88
  30. 138
  31. 148
  32. 104
  33. 50
  34. 101
  35. 110
  36. 141
  37. 88
  38. 171
  39. 122
  40. 102

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