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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 644 · 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. 1.26 × 4 =
  2. 2.26 × 8 =
  3. 3.36 × 4 =
  4. 4.54 × 4 =
  5. 5.14 × 8 =
  6. 6.72 × 4 =
  7. 7.60 × 4 =
  8. 8.34 × 4 =
  9. 9.19 × 8 =
  10. 10.41 × 4 =
  11. 11.37 × 4 =
  12. 12.24 × 8 =
  13. 13.33 × 8 =
  14. 14.16 × 8 =
  15. 15.36 × 8 =
  16. 16.27 × 4 =
  17. 17.51 × 4 =
  18. 18.29 × 8 =
  19. 19.28 × 8 =
  20. 20.35 × 4 =
  21. 21.37 × 8 =
  22. 22.29 × 4 =
  23. 23.38 × 4 =
  24. 24.21 × 4 =
  25. 25.53 × 4 =
  26. 26.47 × 4 =
  27. 27.50 × 4 =
  28. 28.20 × 8 =
  29. 29.18 × 8 =
  30. 30.34 × 8 =
  31. 31.67 × 4 =
  32. 32.32 × 8 =
  33. 33.13 × 4 =
  34. 34.55 × 4 =
  35. 35.39 × 8 =
  36. 36.15 × 4 =
  37. 37.30 × 4 =
  38. 38.13 × 8 =
  39. 39.30 × 8 =
  40. 40.14 × 4 =

Answer key

  1. 104
  2. 208
  3. 144
  4. 216
  5. 112
  6. 288
  7. 240
  8. 136
  9. 152
  10. 164
  11. 148
  12. 192
  13. 264
  14. 128
  15. 288
  16. 108
  17. 204
  18. 232
  19. 224
  20. 140
  21. 296
  22. 116
  23. 152
  24. 84
  25. 212
  26. 188
  27. 200
  28. 160
  29. 144
  30. 272
  31. 268
  32. 256
  33. 52
  34. 220
  35. 312
  36. 60
  37. 120
  38. 104
  39. 240
  40. 56

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