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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 137 · 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. 1.79 + 63 =
  2. 2.70 + 43 =
  3. 3.79 + 25 =
  4. 4.45 + 33 =
  5. 5.27 + 18 =
  6. 6.40 + 76 =
  7. 7.79 + 17 =
  8. 8.36 + 71 =
  9. 9.34 + 78 =
  10. 10.36 + 39 =
  11. 11.47 + 12 =
  12. 12.57 + 65 =
  13. 13.72 + 37 =
  14. 14.88 + 31 =
  15. 15.33 + 85 =
  16. 16.57 + 72 =
  17. 17.65 + 83 =
  18. 18.81 + 19 =
  19. 19.74 + 49 =
  20. 20.28 + 79 =
  21. 21.36 + 34 =
  22. 22.41 + 31 =
  23. 23.34 + 24 =
  24. 24.42 + 37 =
  25. 25.35 + 81 =
  26. 26.43 + 17 =
  27. 27.44 + 54 =
  28. 28.28 + 83 =
  29. 29.84 + 46 =
  30. 30.89 + 79 =
  31. 31.28 + 86 =
  32. 32.80 + 32 =
  33. 33.86 + 62 =
  34. 34.30 + 63 =
  35. 35.82 + 32 =
  36. 36.77 + 63 =
  37. 37.63 + 29 =
  38. 38.84 + 88 =
  39. 39.49 + 31 =
  40. 40.35 + 13 =

Answer key

  1. 142
  2. 113
  3. 104
  4. 78
  5. 45
  6. 116
  7. 96
  8. 107
  9. 112
  10. 75
  11. 59
  12. 122
  13. 109
  14. 119
  15. 118
  16. 129
  17. 148
  18. 100
  19. 123
  20. 107
  21. 70
  22. 72
  23. 58
  24. 79
  25. 116
  26. 60
  27. 98
  28. 111
  29. 130
  30. 168
  31. 114
  32. 112
  33. 148
  34. 93
  35. 114
  36. 140
  37. 92
  38. 172
  39. 80
  40. 48

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