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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 579 · 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. 1.62 + 44 =
  2. 2.79 + 19 =
  3. 3.71 + 55 =
  4. 4.39 + 25 =
  5. 5.24 + 39 =
  6. 6.80 + 86 =
  7. 7.63 + 75 =
  8. 8.61 + 17 =
  9. 9.87 + 78 =
  10. 10.55 + 64 =
  11. 11.43 + 61 =
  12. 12.29 + 24 =
  13. 13.83 + 24 =
  14. 14.40 + 34 =
  15. 15.44 + 19 =
  16. 16.70 + 24 =
  17. 17.50 + 74 =
  18. 18.89 + 77 =
  19. 19.44 + 67 =
  20. 20.21 + 88 =
  21. 21.26 + 78 =
  22. 22.61 + 65 =
  23. 23.26 + 56 =
  24. 24.31 + 83 =
  25. 25.82 + 88 =
  26. 26.39 + 61 =
  27. 27.54 + 41 =
  28. 28.37 + 78 =
  29. 29.22 + 39 =
  30. 30.38 + 57 =
  31. 31.65 + 27 =
  32. 32.51 + 71 =
  33. 33.56 + 63 =
  34. 34.50 + 83 =
  35. 35.57 + 31 =
  36. 36.26 + 41 =
  37. 37.36 + 85 =
  38. 38.72 + 48 =
  39. 39.63 + 45 =
  40. 40.69 + 68 =

Answer key

  1. 106
  2. 98
  3. 126
  4. 64
  5. 63
  6. 166
  7. 138
  8. 78
  9. 165
  10. 119
  11. 104
  12. 53
  13. 107
  14. 74
  15. 63
  16. 94
  17. 124
  18. 166
  19. 111
  20. 109
  21. 104
  22. 126
  23. 82
  24. 114
  25. 170
  26. 100
  27. 95
  28. 115
  29. 61
  30. 95
  31. 92
  32. 122
  33. 119
  34. 133
  35. 88
  36. 67
  37. 121
  38. 120
  39. 108
  40. 137

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