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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 707 · 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. 1.28 × 4 =
  2. 2.67 × 4 =
  3. 3.53 × 4 =
  4. 4.40 × 4 =
  5. 5.24 × 8 =
  6. 6.32 × 4 =
  7. 7.14 × 8 =
  8. 8.32 × 8 =
  9. 9.74 × 4 =
  10. 10.37 × 8 =
  11. 11.58 × 4 =
  12. 12.20 × 4 =
  13. 13.33 × 8 =
  14. 14.21 × 8 =
  15. 15.42 × 4 =
  16. 16.23 × 4 =
  17. 17.30 × 4 =
  18. 18.38 × 8 =
  19. 19.19 × 8 =
  20. 20.31 × 8 =
  21. 21.18 × 4 =
  22. 22.72 × 4 =
  23. 23.25 × 4 =
  24. 24.60 × 4 =
  25. 25.16 × 8 =
  26. 26.12 × 8 =
  27. 27.28 × 8 =
  28. 28.69 × 4 =
  29. 29.35 × 4 =
  30. 30.70 × 4 =
  31. 31.62 × 4 =
  32. 32.23 × 8 =
  33. 33.52 × 4 =
  34. 34.19 × 4 =
  35. 35.66 × 4 =
  36. 36.31 × 4 =
  37. 37.14 × 4 =
  38. 38.22 × 8 =
  39. 39.34 × 4 =
  40. 40.36 × 8 =

Answer key

  1. 112
  2. 268
  3. 212
  4. 160
  5. 192
  6. 128
  7. 112
  8. 256
  9. 296
  10. 296
  11. 232
  12. 80
  13. 264
  14. 168
  15. 168
  16. 92
  17. 120
  18. 304
  19. 152
  20. 248
  21. 72
  22. 288
  23. 100
  24. 240
  25. 128
  26. 96
  27. 224
  28. 276
  29. 140
  30. 280
  31. 248
  32. 184
  33. 208
  34. 76
  35. 264
  36. 124
  37. 56
  38. 176
  39. 136
  40. 288

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