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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 221 · 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. 1.75 + 27 =
  2. 2.63 + 49 =
  3. 3.71 + 78 =
  4. 4.29 + 81 =
  5. 5.26 + 17 =
  6. 6.89 + 48 =
  7. 7.24 + 61 =
  8. 8.75 + 45 =
  9. 9.68 + 13 =
  10. 10.30 + 79 =
  11. 11.24 + 83 =
  12. 12.34 + 82 =
  13. 13.50 + 35 =
  14. 14.37 + 24 =
  15. 15.35 + 12 =
  16. 16.87 + 26 =
  17. 17.22 + 82 =
  18. 18.41 + 36 =
  19. 19.26 + 41 =
  20. 20.81 + 46 =
  21. 21.84 + 18 =
  22. 22.46 + 55 =
  23. 23.32 + 13 =
  24. 24.81 + 88 =
  25. 25.43 + 42 =
  26. 26.69 + 88 =
  27. 27.63 + 38 =
  28. 28.61 + 13 =
  29. 29.40 + 85 =
  30. 30.80 + 49 =
  31. 31.53 + 16 =
  32. 32.25 + 79 =
  33. 33.62 + 66 =
  34. 34.38 + 54 =
  35. 35.55 + 55 =
  36. 36.61 + 71 =
  37. 37.21 + 55 =
  38. 38.77 + 12 =
  39. 39.46 + 33 =
  40. 40.51 + 76 =

Answer key

  1. 102
  2. 112
  3. 149
  4. 110
  5. 43
  6. 137
  7. 85
  8. 120
  9. 81
  10. 109
  11. 107
  12. 116
  13. 85
  14. 61
  15. 47
  16. 113
  17. 104
  18. 77
  19. 67
  20. 127
  21. 102
  22. 101
  23. 45
  24. 169
  25. 85
  26. 157
  27. 101
  28. 74
  29. 125
  30. 129
  31. 69
  32. 104
  33. 128
  34. 92
  35. 110
  36. 132
  37. 76
  38. 89
  39. 79
  40. 127

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