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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 741 · 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. 1.52 × 4 =
  2. 2.35 × 8 =
  3. 3.37 × 8 =
  4. 4.57 × 4 =
  5. 5.26 × 4 =
  6. 6.26 × 8 =
  7. 7.13 × 4 =
  8. 8.14 × 8 =
  9. 9.68 × 4 =
  10. 10.39 × 4 =
  11. 11.21 × 8 =
  12. 12.29 × 4 =
  13. 13.62 × 4 =
  14. 14.13 × 8 =
  15. 15.17 × 8 =
  16. 16.67 × 4 =
  17. 17.30 × 4 =
  18. 18.60 × 4 =
  19. 19.18 × 8 =
  20. 20.32 × 8 =
  21. 21.54 × 4 =
  22. 22.15 × 8 =
  23. 23.70 × 4 =
  24. 24.28 × 4 =
  25. 25.74 × 4 =
  26. 26.34 × 4 =
  27. 27.16 × 8 =
  28. 28.49 × 4 =
  29. 29.29 × 8 =
  30. 30.17 × 4 =
  31. 31.18 × 4 =
  32. 32.35 × 4 =
  33. 33.71 × 4 =
  34. 34.75 × 4 =
  35. 35.59 × 4 =
  36. 36.28 × 8 =
  37. 37.38 × 4 =
  38. 38.33 × 8 =
  39. 39.73 × 4 =
  40. 40.40 × 4 =

Answer key

  1. 208
  2. 280
  3. 296
  4. 228
  5. 104
  6. 208
  7. 52
  8. 112
  9. 272
  10. 156
  11. 168
  12. 116
  13. 248
  14. 104
  15. 136
  16. 268
  17. 120
  18. 240
  19. 144
  20. 256
  21. 216
  22. 120
  23. 280
  24. 112
  25. 296
  26. 136
  27. 128
  28. 196
  29. 232
  30. 68
  31. 72
  32. 140
  33. 284
  34. 300
  35. 236
  36. 224
  37. 152
  38. 264
  39. 292
  40. 160

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