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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 189 · 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. 1.21 + 63 =
  2. 2.27 + 61 =
  3. 3.22 + 59 =
  4. 4.52 + 68 =
  5. 5.83 + 53 =
  6. 6.21 + 51 =
  7. 7.24 + 77 =
  8. 8.49 + 88 =
  9. 9.65 + 54 =
  10. 10.46 + 87 =
  11. 11.64 + 33 =
  12. 12.89 + 89 =
  13. 13.40 + 51 =
  14. 14.82 + 17 =
  15. 15.75 + 77 =
  16. 16.62 + 16 =
  17. 17.27 + 78 =
  18. 18.56 + 63 =
  19. 19.61 + 82 =
  20. 20.22 + 45 =
  21. 21.37 + 67 =
  22. 22.62 + 44 =
  23. 23.22 + 61 =
  24. 24.70 + 23 =
  25. 25.88 + 44 =
  26. 26.89 + 35 =
  27. 27.48 + 56 =
  28. 28.77 + 13 =
  29. 29.42 + 77 =
  30. 30.69 + 86 =
  31. 31.76 + 45 =
  32. 32.78 + 33 =
  33. 33.75 + 89 =
  34. 34.86 + 37 =
  35. 35.80 + 16 =
  36. 36.85 + 41 =
  37. 37.73 + 54 =
  38. 38.89 + 17 =
  39. 39.49 + 63 =
  40. 40.40 + 53 =

Answer key

  1. 84
  2. 88
  3. 81
  4. 120
  5. 136
  6. 72
  7. 101
  8. 137
  9. 119
  10. 133
  11. 97
  12. 178
  13. 91
  14. 99
  15. 152
  16. 78
  17. 105
  18. 119
  19. 143
  20. 67
  21. 104
  22. 106
  23. 83
  24. 93
  25. 132
  26. 124
  27. 104
  28. 90
  29. 119
  30. 155
  31. 121
  32. 111
  33. 164
  34. 123
  35. 96
  36. 126
  37. 127
  38. 106
  39. 112
  40. 93

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