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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 690 · 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. 1.37 × 4 =
  2. 2.21 × 4 =
  3. 3.36 × 8 =
  4. 4.30 × 8 =
  5. 5.23 × 8 =
  6. 6.24 × 4 =
  7. 7.57 × 4 =
  8. 8.33 × 8 =
  9. 9.20 × 8 =
  10. 10.22 × 8 =
  11. 11.15 × 8 =
  12. 12.18 × 4 =
  13. 13.59 × 4 =
  14. 14.42 × 4 =
  15. 15.24 × 8 =
  16. 16.38 × 8 =
  17. 17.19 × 4 =
  18. 18.44 × 4 =
  19. 19.34 × 8 =
  20. 20.32 × 8 =
  21. 21.29 × 8 =
  22. 22.32 × 4 =
  23. 23.27 × 8 =
  24. 24.12 × 8 =
  25. 25.46 × 4 =
  26. 26.49 × 4 =
  27. 27.12 × 4 =
  28. 28.18 × 8 =
  29. 29.65 × 4 =
  30. 30.13 × 8 =
  31. 31.28 × 8 =
  32. 32.39 × 8 =
  33. 33.19 × 8 =
  34. 34.15 × 4 =
  35. 35.56 × 4 =
  36. 36.26 × 8 =
  37. 37.40 × 8 =
  38. 38.17 × 8 =
  39. 39.36 × 4 =
  40. 40.67 × 4 =

Answer key

  1. 148
  2. 84
  3. 288
  4. 240
  5. 184
  6. 96
  7. 228
  8. 264
  9. 160
  10. 176
  11. 120
  12. 72
  13. 236
  14. 168
  15. 192
  16. 304
  17. 76
  18. 176
  19. 272
  20. 256
  21. 232
  22. 128
  23. 216
  24. 96
  25. 184
  26. 196
  27. 48
  28. 144
  29. 260
  30. 104
  31. 224
  32. 312
  33. 152
  34. 60
  35. 224
  36. 208
  37. 320
  38. 136
  39. 144
  40. 268

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