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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 424 · 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. 1.52 + 39 =
  2. 2.39 + 47 =
  3. 3.63 + 13 =
  4. 4.38 + 13 =
  5. 5.31 + 52 =
  6. 6.80 + 15 =
  7. 7.71 + 12 =
  8. 8.30 + 31 =
  9. 9.45 + 23 =
  10. 10.74 + 29 =
  11. 11.59 + 22 =
  12. 12.45 + 46 =
  13. 13.39 + 22 =
  14. 14.44 + 59 =
  15. 15.34 + 72 =
  16. 16.35 + 25 =
  17. 17.41 + 13 =
  18. 18.40 + 42 =
  19. 19.73 + 46 =
  20. 20.53 + 25 =
  21. 21.88 + 71 =
  22. 22.29 + 89 =
  23. 23.81 + 87 =
  24. 24.60 + 62 =
  25. 25.35 + 26 =
  26. 26.70 + 71 =
  27. 27.70 + 62 =
  28. 28.58 + 71 =
  29. 29.65 + 62 =
  30. 30.70 + 18 =
  31. 31.88 + 19 =
  32. 32.86 + 48 =
  33. 33.74 + 23 =
  34. 34.52 + 89 =
  35. 35.60 + 18 =
  36. 36.65 + 16 =
  37. 37.87 + 69 =
  38. 38.47 + 45 =
  39. 39.64 + 34 =
  40. 40.42 + 25 =

Answer key

  1. 91
  2. 86
  3. 76
  4. 51
  5. 83
  6. 95
  7. 83
  8. 61
  9. 68
  10. 103
  11. 81
  12. 91
  13. 61
  14. 103
  15. 106
  16. 60
  17. 54
  18. 82
  19. 119
  20. 78
  21. 159
  22. 118
  23. 168
  24. 122
  25. 61
  26. 141
  27. 132
  28. 129
  29. 127
  30. 88
  31. 107
  32. 134
  33. 97
  34. 141
  35. 78
  36. 81
  37. 156
  38. 92
  39. 98
  40. 67

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