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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 15 · 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. 1.39 × 4 =
  2. 2.35 × 8 =
  3. 3.68 × 4 =
  4. 4.56 × 4 =
  5. 5.55 × 4 =
  6. 6.29 × 4 =
  7. 7.31 × 8 =
  8. 8.66 × 4 =
  9. 9.47 × 4 =
  10. 10.34 × 8 =
  11. 11.39 × 8 =
  12. 12.60 × 4 =
  13. 13.27 × 4 =
  14. 14.17 × 8 =
  15. 15.37 × 8 =
  16. 16.38 × 8 =
  17. 17.41 × 4 =
  18. 18.54 × 4 =
  19. 19.29 × 8 =
  20. 20.32 × 8 =
  21. 21.28 × 8 =
  22. 22.14 × 8 =
  23. 23.40 × 8 =
  24. 24.24 × 4 =
  25. 25.43 × 4 =
  26. 26.65 × 4 =
  27. 27.72 × 4 =
  28. 28.18 × 4 =
  29. 29.33 × 8 =
  30. 30.49 × 4 =
  31. 31.45 × 4 =
  32. 32.12 × 8 =
  33. 33.27 × 8 =
  34. 34.30 × 4 =
  35. 35.18 × 8 =
  36. 36.23 × 8 =
  37. 37.12 × 4 =
  38. 38.14 × 4 =
  39. 39.15 × 8 =
  40. 40.20 × 8 =

Answer key

  1. 156
  2. 280
  3. 272
  4. 224
  5. 220
  6. 116
  7. 248
  8. 264
  9. 188
  10. 272
  11. 312
  12. 240
  13. 108
  14. 136
  15. 296
  16. 304
  17. 164
  18. 216
  19. 232
  20. 256
  21. 224
  22. 112
  23. 320
  24. 96
  25. 172
  26. 260
  27. 288
  28. 72
  29. 264
  30. 196
  31. 180
  32. 96
  33. 216
  34. 120
  35. 144
  36. 184
  37. 48
  38. 56
  39. 120
  40. 160

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