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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 188 · 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. 1.32 + 42 =
  2. 2.75 + 83 =
  3. 3.33 + 22 =
  4. 4.73 + 85 =
  5. 5.63 + 65 =
  6. 6.59 + 69 =
  7. 7.54 + 36 =
  8. 8.28 + 17 =
  9. 9.41 + 65 =
  10. 10.89 + 43 =
  11. 11.85 + 76 =
  12. 12.78 + 34 =
  13. 13.46 + 21 =
  14. 14.34 + 49 =
  15. 15.53 + 48 =
  16. 16.40 + 88 =
  17. 17.71 + 27 =
  18. 18.21 + 83 =
  19. 19.74 + 73 =
  20. 20.52 + 45 =
  21. 21.21 + 85 =
  22. 22.25 + 14 =
  23. 23.60 + 76 =
  24. 24.51 + 67 =
  25. 25.25 + 12 =
  26. 26.65 + 33 =
  27. 27.67 + 31 =
  28. 28.80 + 79 =
  29. 29.21 + 77 =
  30. 30.39 + 76 =
  31. 31.29 + 71 =
  32. 32.68 + 33 =
  33. 33.47 + 34 =
  34. 34.58 + 69 =
  35. 35.81 + 41 =
  36. 36.55 + 32 =
  37. 37.81 + 31 =
  38. 38.89 + 34 =
  39. 39.59 + 13 =
  40. 40.41 + 31 =

Answer key

  1. 74
  2. 158
  3. 55
  4. 158
  5. 128
  6. 128
  7. 90
  8. 45
  9. 106
  10. 132
  11. 161
  12. 112
  13. 67
  14. 83
  15. 101
  16. 128
  17. 98
  18. 104
  19. 147
  20. 97
  21. 106
  22. 39
  23. 136
  24. 118
  25. 37
  26. 98
  27. 98
  28. 159
  29. 98
  30. 115
  31. 100
  32. 101
  33. 81
  34. 127
  35. 122
  36. 87
  37. 112
  38. 123
  39. 72
  40. 72

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