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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 713 · 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. 1.44 + 77 =
  2. 2.76 + 21 =
  3. 3.89 + 25 =
  4. 4.45 + 87 =
  5. 5.60 + 33 =
  6. 6.58 + 71 =
  7. 7.38 + 66 =
  8. 8.72 + 66 =
  9. 9.40 + 39 =
  10. 10.28 + 36 =
  11. 11.89 + 53 =
  12. 12.56 + 14 =
  13. 13.60 + 18 =
  14. 14.25 + 36 =
  15. 15.29 + 34 =
  16. 16.81 + 59 =
  17. 17.62 + 19 =
  18. 18.63 + 89 =
  19. 19.28 + 14 =
  20. 20.80 + 21 =
  21. 21.76 + 69 =
  22. 22.24 + 13 =
  23. 23.65 + 14 =
  24. 24.43 + 88 =
  25. 25.23 + 53 =
  26. 26.50 + 13 =
  27. 27.31 + 79 =
  28. 28.26 + 79 =
  29. 29.52 + 21 =
  30. 30.55 + 28 =
  31. 31.34 + 16 =
  32. 32.29 + 49 =
  33. 33.51 + 68 =
  34. 34.51 + 43 =
  35. 35.31 + 44 =
  36. 36.46 + 85 =
  37. 37.32 + 48 =
  38. 38.48 + 13 =
  39. 39.26 + 25 =
  40. 40.80 + 35 =

Answer key

  1. 121
  2. 97
  3. 114
  4. 132
  5. 93
  6. 129
  7. 104
  8. 138
  9. 79
  10. 64
  11. 142
  12. 70
  13. 78
  14. 61
  15. 63
  16. 140
  17. 81
  18. 152
  19. 42
  20. 101
  21. 145
  22. 37
  23. 79
  24. 131
  25. 76
  26. 63
  27. 110
  28. 105
  29. 73
  30. 83
  31. 50
  32. 78
  33. 119
  34. 94
  35. 75
  36. 131
  37. 80
  38. 61
  39. 51
  40. 115

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