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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 847 · 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. 1.88 + 31 =
  2. 2.54 + 63 =
  3. 3.45 + 22 =
  4. 4.55 + 84 =
  5. 5.35 + 23 =
  6. 6.52 + 23 =
  7. 7.28 + 55 =
  8. 8.44 + 36 =
  9. 9.29 + 21 =
  10. 10.27 + 21 =
  11. 11.86 + 26 =
  12. 12.83 + 37 =
  13. 13.85 + 72 =
  14. 14.48 + 32 =
  15. 15.26 + 86 =
  16. 16.76 + 85 =
  17. 17.68 + 88 =
  18. 18.86 + 12 =
  19. 19.26 + 17 =
  20. 20.34 + 37 =
  21. 21.39 + 78 =
  22. 22.43 + 14 =
  23. 23.69 + 16 =
  24. 24.89 + 69 =
  25. 25.56 + 51 =
  26. 26.22 + 16 =
  27. 27.46 + 19 =
  28. 28.83 + 59 =
  29. 29.69 + 33 =
  30. 30.37 + 78 =
  31. 31.62 + 74 =
  32. 32.73 + 14 =
  33. 33.30 + 53 =
  34. 34.72 + 21 =
  35. 35.49 + 49 =
  36. 36.43 + 35 =
  37. 37.25 + 21 =
  38. 38.34 + 18 =
  39. 39.72 + 35 =
  40. 40.61 + 53 =

Answer key

  1. 119
  2. 117
  3. 67
  4. 139
  5. 58
  6. 75
  7. 83
  8. 80
  9. 50
  10. 48
  11. 112
  12. 120
  13. 157
  14. 80
  15. 112
  16. 161
  17. 156
  18. 98
  19. 43
  20. 71
  21. 117
  22. 57
  23. 85
  24. 158
  25. 107
  26. 38
  27. 65
  28. 142
  29. 102
  30. 115
  31. 136
  32. 87
  33. 83
  34. 93
  35. 98
  36. 78
  37. 46
  38. 52
  39. 107
  40. 114

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