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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 659 · 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. 2.55 × 4 =
  3. 3.33 × 8 =
  4. 4.67 × 4 =
  5. 5.62 × 4 =
  6. 6.37 × 8 =
  7. 7.20 × 8 =
  8. 8.15 × 4 =
  9. 9.34 × 8 =
  10. 10.13 × 4 =
  11. 11.20 × 4 =
  12. 12.39 × 8 =
  13. 13.63 × 4 =
  14. 14.39 × 4 =
  15. 15.14 × 4 =
  16. 16.30 × 8 =
  17. 17.18 × 8 =
  18. 18.50 × 4 =
  19. 19.38 × 8 =
  20. 20.40 × 4 =
  21. 21.28 × 8 =
  22. 22.24 × 4 =
  23. 23.32 × 8 =
  24. 24.70 × 4 =
  25. 25.29 × 8 =
  26. 26.53 × 4 =
  27. 27.23 × 8 =
  28. 28.12 × 4 =
  29. 29.35 × 4 =
  30. 30.68 × 4 =
  31. 31.21 × 4 =
  32. 32.26 × 8 =
  33. 33.45 × 4 =
  34. 34.59 × 4 =
  35. 35.29 × 4 =
  36. 36.27 × 8 =
  37. 37.22 × 8 =
  38. 38.40 × 8 =
  39. 39.43 × 4 =
  40. 40.44 × 4 =

Answer key

  1. 112
  2. 220
  3. 264
  4. 268
  5. 248
  6. 296
  7. 160
  8. 60
  9. 272
  10. 52
  11. 80
  12. 312
  13. 252
  14. 156
  15. 56
  16. 240
  17. 144
  18. 200
  19. 304
  20. 160
  21. 224
  22. 96
  23. 256
  24. 280
  25. 232
  26. 212
  27. 184
  28. 48
  29. 140
  30. 272
  31. 84
  32. 208
  33. 180
  34. 236
  35. 116
  36. 216
  37. 176
  38. 320
  39. 172
  40. 176

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