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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 619 · 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. 1.56 × 4 =
  2. 2.17 × 8 =
  3. 3.31 × 8 =
  4. 4.23 × 8 =
  5. 5.16 × 8 =
  6. 6.59 × 4 =
  7. 7.47 × 4 =
  8. 8.20 × 8 =
  9. 9.36 × 8 =
  10. 10.15 × 4 =
  11. 11.33 × 4 =
  12. 12.55 × 4 =
  13. 13.70 × 4 =
  14. 14.48 × 4 =
  15. 15.14 × 4 =
  16. 16.38 × 8 =
  17. 17.14 × 8 =
  18. 18.30 × 8 =
  19. 19.72 × 4 =
  20. 20.40 × 8 =
  21. 21.13 × 8 =
  22. 22.17 × 4 =
  23. 23.46 × 4 =
  24. 24.62 × 4 =
  25. 25.37 × 8 =
  26. 26.29 × 8 =
  27. 27.30 × 4 =
  28. 28.29 × 4 =
  29. 29.22 × 8 =
  30. 30.12 × 4 =
  31. 31.16 × 4 =
  32. 32.45 × 4 =
  33. 33.60 × 4 =
  34. 34.28 × 8 =
  35. 35.27 × 8 =
  36. 36.24 × 4 =
  37. 37.21 × 4 =
  38. 38.15 × 8 =
  39. 39.65 × 4 =
  40. 40.68 × 4 =

Answer key

  1. 224
  2. 136
  3. 248
  4. 184
  5. 128
  6. 236
  7. 188
  8. 160
  9. 288
  10. 60
  11. 132
  12. 220
  13. 280
  14. 192
  15. 56
  16. 304
  17. 112
  18. 240
  19. 288
  20. 320
  21. 104
  22. 68
  23. 184
  24. 248
  25. 296
  26. 232
  27. 120
  28. 116
  29. 176
  30. 48
  31. 64
  32. 180
  33. 240
  34. 224
  35. 216
  36. 96
  37. 84
  38. 120
  39. 260
  40. 272

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