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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 72 · 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. 1.73 + 16 =
  2. 2.42 + 42 =
  3. 3.52 + 32 =
  4. 4.88 + 55 =
  5. 5.62 + 14 =
  6. 6.23 + 16 =
  7. 7.74 + 33 =
  8. 8.46 + 37 =
  9. 9.46 + 65 =
  10. 10.39 + 22 =
  11. 11.23 + 79 =
  12. 12.54 + 35 =
  13. 13.85 + 53 =
  14. 14.30 + 15 =
  15. 15.89 + 46 =
  16. 16.23 + 44 =
  17. 17.65 + 88 =
  18. 18.44 + 14 =
  19. 19.64 + 71 =
  20. 20.75 + 14 =
  21. 21.67 + 68 =
  22. 22.51 + 81 =
  23. 23.67 + 14 =
  24. 24.39 + 88 =
  25. 25.51 + 63 =
  26. 26.76 + 28 =
  27. 27.25 + 25 =
  28. 28.82 + 53 =
  29. 29.39 + 39 =
  30. 30.50 + 51 =
  31. 31.22 + 69 =
  32. 32.42 + 34 =
  33. 33.52 + 46 =
  34. 34.42 + 68 =
  35. 35.42 + 51 =
  36. 36.82 + 43 =
  37. 37.61 + 65 =
  38. 38.44 + 34 =
  39. 39.27 + 31 =
  40. 40.68 + 33 =

Answer key

  1. 89
  2. 84
  3. 84
  4. 143
  5. 76
  6. 39
  7. 107
  8. 83
  9. 111
  10. 61
  11. 102
  12. 89
  13. 138
  14. 45
  15. 135
  16. 67
  17. 153
  18. 58
  19. 135
  20. 89
  21. 135
  22. 132
  23. 81
  24. 127
  25. 114
  26. 104
  27. 50
  28. 135
  29. 78
  30. 101
  31. 91
  32. 76
  33. 98
  34. 110
  35. 93
  36. 125
  37. 126
  38. 78
  39. 58
  40. 101

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