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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 375 · 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. 1.47 × 4 =
  2. 2.27 × 8 =
  3. 3.31 × 8 =
  4. 4.35 × 4 =
  5. 5.38 × 8 =
  6. 6.13 × 8 =
  7. 7.16 × 4 =
  8. 8.20 × 8 =
  9. 9.63 × 4 =
  10. 10.62 × 4 =
  11. 11.68 × 4 =
  12. 12.17 × 4 =
  13. 13.25 × 8 =
  14. 14.26 × 8 =
  15. 15.22 × 8 =
  16. 16.28 × 8 =
  17. 17.56 × 4 =
  18. 18.18 × 4 =
  19. 19.23 × 4 =
  20. 20.12 × 4 =
  21. 21.35 × 8 =
  22. 22.39 × 8 =
  23. 23.72 × 4 =
  24. 24.37 × 8 =
  25. 25.17 × 8 =
  26. 26.32 × 8 =
  27. 27.60 × 4 =
  28. 28.15 × 8 =
  29. 29.36 × 8 =
  30. 30.50 × 4 =
  31. 31.36 × 4 =
  32. 32.22 × 4 =
  33. 33.32 × 4 =
  34. 34.24 × 8 =
  35. 35.74 × 4 =
  36. 36.37 × 4 =
  37. 37.57 × 4 =
  38. 38.59 × 4 =
  39. 39.45 × 4 =
  40. 40.31 × 4 =

Answer key

  1. 188
  2. 216
  3. 248
  4. 140
  5. 304
  6. 104
  7. 64
  8. 160
  9. 252
  10. 248
  11. 272
  12. 68
  13. 200
  14. 208
  15. 176
  16. 224
  17. 224
  18. 72
  19. 92
  20. 48
  21. 280
  22. 312
  23. 288
  24. 296
  25. 136
  26. 256
  27. 240
  28. 120
  29. 288
  30. 200
  31. 144
  32. 88
  33. 128
  34. 192
  35. 296
  36. 148
  37. 228
  38. 236
  39. 180
  40. 124

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