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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 585 · 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. 1.39 × 8 =
  2. 2.59 × 4 =
  3. 3.16 × 4 =
  4. 4.27 × 8 =
  5. 5.36 × 8 =
  6. 6.75 × 4 =
  7. 7.33 × 8 =
  8. 8.29 × 8 =
  9. 9.25 × 8 =
  10. 10.21 × 4 =
  11. 11.74 × 4 =
  12. 12.26 × 8 =
  13. 13.30 × 8 =
  14. 14.61 × 4 =
  15. 15.28 × 4 =
  16. 16.47 × 4 =
  17. 17.16 × 8 =
  18. 18.58 × 4 =
  19. 19.28 × 8 =
  20. 20.20 × 8 =
  21. 21.21 × 8 =
  22. 22.45 × 4 =
  23. 23.38 × 8 =
  24. 24.72 × 4 =
  25. 25.29 × 4 =
  26. 26.50 × 4 =
  27. 27.65 × 4 =
  28. 28.15 × 8 =
  29. 29.14 × 8 =
  30. 30.35 × 8 =
  31. 31.40 × 8 =
  32. 32.17 × 8 =
  33. 33.62 × 4 =
  34. 34.22 × 8 =
  35. 35.22 × 4 =
  36. 36.39 × 4 =
  37. 37.42 × 4 =
  38. 38.31 × 4 =
  39. 39.53 × 4 =
  40. 40.73 × 4 =

Answer key

  1. 312
  2. 236
  3. 64
  4. 216
  5. 288
  6. 300
  7. 264
  8. 232
  9. 200
  10. 84
  11. 296
  12. 208
  13. 240
  14. 244
  15. 112
  16. 188
  17. 128
  18. 232
  19. 224
  20. 160
  21. 168
  22. 180
  23. 304
  24. 288
  25. 116
  26. 200
  27. 260
  28. 120
  29. 112
  30. 280
  31. 320
  32. 136
  33. 248
  34. 176
  35. 88
  36. 156
  37. 168
  38. 124
  39. 212
  40. 292

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