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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 176 · 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. 1.87 + 78 =
  2. 2.79 + 44 =
  3. 3.84 + 59 =
  4. 4.62 + 86 =
  5. 5.62 + 43 =
  6. 6.54 + 81 =
  7. 7.75 + 31 =
  8. 8.37 + 44 =
  9. 9.44 + 15 =
  10. 10.25 + 78 =
  11. 11.63 + 23 =
  12. 12.59 + 73 =
  13. 13.42 + 65 =
  14. 14.75 + 24 =
  15. 15.71 + 34 =
  16. 16.84 + 76 =
  17. 17.64 + 18 =
  18. 18.21 + 85 =
  19. 19.67 + 71 =
  20. 20.22 + 13 =
  21. 21.26 + 55 =
  22. 22.31 + 69 =
  23. 23.67 + 31 =
  24. 24.84 + 75 =
  25. 25.37 + 36 =
  26. 26.26 + 18 =
  27. 27.73 + 61 =
  28. 28.27 + 65 =
  29. 29.23 + 84 =
  30. 30.89 + 21 =
  31. 31.38 + 14 =
  32. 32.39 + 31 =
  33. 33.42 + 49 =
  34. 34.41 + 55 =
  35. 35.38 + 52 =
  36. 36.42 + 27 =
  37. 37.36 + 21 =
  38. 38.28 + 17 =
  39. 39.89 + 88 =
  40. 40.29 + 54 =

Answer key

  1. 165
  2. 123
  3. 143
  4. 148
  5. 105
  6. 135
  7. 106
  8. 81
  9. 59
  10. 103
  11. 86
  12. 132
  13. 107
  14. 99
  15. 105
  16. 160
  17. 82
  18. 106
  19. 138
  20. 35
  21. 81
  22. 100
  23. 98
  24. 159
  25. 73
  26. 44
  27. 134
  28. 92
  29. 107
  30. 110
  31. 52
  32. 70
  33. 91
  34. 96
  35. 90
  36. 69
  37. 57
  38. 45
  39. 177
  40. 83

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