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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 130 · 40 questions
TalentJR

How to do it in your head (Double, double, double): × 2: double once. × 4: double, then double again. × 8: double three times.

NameDateTime takenScore ___ / 40
  1. 1.28 × 4 =
  2. 2.56 × 4 =
  3. 3.38 × 4 =
  4. 4.35 × 4 =
  5. 5.50 × 4 =
  6. 6.66 × 4 =
  7. 7.41 × 4 =
  8. 8.14 × 8 =
  9. 9.25 × 8 =
  10. 10.58 × 4 =
  11. 11.24 × 8 =
  12. 12.59 × 4 =
  13. 13.19 × 4 =
  14. 14.31 × 4 =
  15. 15.23 × 8 =
  16. 16.37 × 8 =
  17. 17.65 × 4 =
  18. 18.19 × 8 =
  19. 19.33 × 8 =
  20. 20.69 × 4 =
  21. 21.16 × 8 =
  22. 22.31 × 8 =
  23. 23.16 × 4 =
  24. 24.32 × 8 =
  25. 25.32 × 4 =
  26. 26.17 × 8 =
  27. 27.29 × 8 =
  28. 28.35 × 8 =
  29. 29.36 × 4 =
  30. 30.36 × 8 =
  31. 31.18 × 4 =
  32. 32.24 × 4 =
  33. 33.68 × 4 =
  34. 34.71 × 4 =
  35. 35.15 × 8 =
  36. 36.72 × 4 =
  37. 37.53 × 4 =
  38. 38.20 × 8 =
  39. 39.60 × 4 =
  40. 40.52 × 4 =

Answer key

  1. 112
  2. 224
  3. 152
  4. 140
  5. 200
  6. 264
  7. 164
  8. 112
  9. 200
  10. 232
  11. 192
  12. 236
  13. 76
  14. 124
  15. 184
  16. 296
  17. 260
  18. 152
  19. 264
  20. 276
  21. 128
  22. 248
  23. 64
  24. 256
  25. 128
  26. 136
  27. 232
  28. 280
  29. 144
  30. 288
  31. 72
  32. 96
  33. 272
  34. 284
  35. 120
  36. 288
  37. 212
  38. 160
  39. 240
  40. 208

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