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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 628 · 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. 1.16 × 8 =
  2. 2.49 × 4 =
  3. 3.48 × 4 =
  4. 4.42 × 4 =
  5. 5.66 × 4 =
  6. 6.30 × 4 =
  7. 7.67 × 4 =
  8. 8.63 × 4 =
  9. 9.21 × 8 =
  10. 10.13 × 8 =
  11. 11.33 × 8 =
  12. 12.25 × 4 =
  13. 13.17 × 8 =
  14. 14.28 × 8 =
  15. 15.19 × 8 =
  16. 16.62 × 4 =
  17. 17.50 × 4 =
  18. 18.25 × 8 =
  19. 19.29 × 8 =
  20. 20.36 × 8 =
  21. 21.20 × 8 =
  22. 22.38 × 8 =
  23. 23.18 × 4 =
  24. 24.17 × 4 =
  25. 25.64 × 4 =
  26. 26.23 × 4 =
  27. 27.16 × 4 =
  28. 28.44 × 4 =
  29. 29.26 × 8 =
  30. 30.22 × 4 =
  31. 31.13 × 4 =
  32. 32.59 × 4 =
  33. 33.14 × 4 =
  34. 34.32 × 8 =
  35. 35.32 × 4 =
  36. 36.35 × 4 =
  37. 37.12 × 8 =
  38. 38.39 × 4 =
  39. 39.15 × 8 =
  40. 40.37 × 8 =

Answer key

  1. 128
  2. 196
  3. 192
  4. 168
  5. 264
  6. 120
  7. 268
  8. 252
  9. 168
  10. 104
  11. 264
  12. 100
  13. 136
  14. 224
  15. 152
  16. 248
  17. 200
  18. 200
  19. 232
  20. 288
  21. 160
  22. 304
  23. 72
  24. 68
  25. 256
  26. 92
  27. 64
  28. 176
  29. 208
  30. 88
  31. 52
  32. 236
  33. 56
  34. 256
  35. 128
  36. 140
  37. 96
  38. 156
  39. 120
  40. 296

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