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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 184 · 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. 1.35 × 4 =
  2. 2.16 × 8 =
  3. 3.27 × 8 =
  4. 4.74 × 4 =
  5. 5.14 × 4 =
  6. 6.46 × 4 =
  7. 7.36 × 8 =
  8. 8.31 × 8 =
  9. 9.35 × 8 =
  10. 10.18 × 4 =
  11. 11.49 × 4 =
  12. 12.12 × 8 =
  13. 13.44 × 4 =
  14. 14.56 × 4 =
  15. 15.20 × 4 =
  16. 16.34 × 8 =
  17. 17.16 × 4 =
  18. 18.28 × 8 =
  19. 19.52 × 4 =
  20. 20.12 × 4 =
  21. 21.39 × 8 =
  22. 22.47 × 4 =
  23. 23.21 × 8 =
  24. 24.48 × 4 =
  25. 25.17 × 8 =
  26. 26.13 × 8 =
  27. 27.28 × 4 =
  28. 28.30 × 4 =
  29. 29.55 × 4 =
  30. 30.24 × 8 =
  31. 31.25 × 8 =
  32. 32.34 × 4 =
  33. 33.15 × 8 =
  34. 34.17 × 4 =
  35. 35.36 × 4 =
  36. 36.43 × 4 =
  37. 37.72 × 4 =
  38. 38.20 × 8 =
  39. 39.54 × 4 =
  40. 40.62 × 4 =

Answer key

  1. 140
  2. 128
  3. 216
  4. 296
  5. 56
  6. 184
  7. 288
  8. 248
  9. 280
  10. 72
  11. 196
  12. 96
  13. 176
  14. 224
  15. 80
  16. 272
  17. 64
  18. 224
  19. 208
  20. 48
  21. 312
  22. 188
  23. 168
  24. 192
  25. 136
  26. 104
  27. 112
  28. 120
  29. 220
  30. 192
  31. 200
  32. 136
  33. 120
  34. 68
  35. 144
  36. 172
  37. 288
  38. 160
  39. 216
  40. 248

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