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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 157 · 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. 1.32 + 88 =
  2. 2.70 + 23 =
  3. 3.80 + 24 =
  4. 4.73 + 64 =
  5. 5.29 + 84 =
  6. 6.70 + 42 =
  7. 7.59 + 17 =
  8. 8.57 + 29 =
  9. 9.49 + 13 =
  10. 10.75 + 34 =
  11. 11.25 + 74 =
  12. 12.51 + 57 =
  13. 13.74 + 68 =
  14. 14.31 + 89 =
  15. 15.89 + 14 =
  16. 16.51 + 25 =
  17. 17.82 + 49 =
  18. 18.30 + 52 =
  19. 19.27 + 79 =
  20. 20.64 + 88 =
  21. 21.74 + 47 =
  22. 22.61 + 62 =
  23. 23.67 + 51 =
  24. 24.62 + 87 =
  25. 25.34 + 65 =
  26. 26.29 + 72 =
  27. 27.54 + 61 =
  28. 28.58 + 22 =
  29. 29.25 + 69 =
  30. 30.62 + 12 =
  31. 31.48 + 31 =
  32. 32.48 + 35 =
  33. 33.42 + 57 =
  34. 34.36 + 58 =
  35. 35.49 + 51 =
  36. 36.64 + 79 =
  37. 37.47 + 16 =
  38. 38.40 + 48 =
  39. 39.80 + 66 =
  40. 40.77 + 22 =

Answer key

  1. 120
  2. 93
  3. 104
  4. 137
  5. 113
  6. 112
  7. 76
  8. 86
  9. 62
  10. 109
  11. 99
  12. 108
  13. 142
  14. 120
  15. 103
  16. 76
  17. 131
  18. 82
  19. 106
  20. 152
  21. 121
  22. 123
  23. 118
  24. 149
  25. 99
  26. 101
  27. 115
  28. 80
  29. 94
  30. 74
  31. 79
  32. 83
  33. 99
  34. 94
  35. 100
  36. 143
  37. 63
  38. 88
  39. 146
  40. 99

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