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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 283 · 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. 1.19 × 8 =
  2. 2.31 × 8 =
  3. 3.32 × 4 =
  4. 4.14 × 8 =
  5. 5.36 × 8 =
  6. 6.34 × 4 =
  7. 7.52 × 4 =
  8. 8.30 × 8 =
  9. 9.34 × 8 =
  10. 10.22 × 4 =
  11. 11.22 × 8 =
  12. 12.64 × 4 =
  13. 13.42 × 4 =
  14. 14.29 × 4 =
  15. 15.43 × 4 =
  16. 16.37 × 8 =
  17. 17.13 × 8 =
  18. 18.47 × 4 =
  19. 19.57 × 4 =
  20. 20.60 × 4 =
  21. 21.17 × 8 =
  22. 22.37 × 4 =
  23. 23.23 × 4 =
  24. 24.65 × 4 =
  25. 25.24 × 4 =
  26. 26.19 × 4 =
  27. 27.70 × 4 =
  28. 28.27 × 4 =
  29. 29.18 × 8 =
  30. 30.35 × 4 =
  31. 31.38 × 8 =
  32. 32.24 × 8 =
  33. 33.59 × 4 =
  34. 34.15 × 8 =
  35. 35.12 × 4 =
  36. 36.38 × 4 =
  37. 37.30 × 4 =
  38. 38.73 × 4 =
  39. 39.33 × 4 =
  40. 40.17 × 4 =

Answer key

  1. 152
  2. 248
  3. 128
  4. 112
  5. 288
  6. 136
  7. 208
  8. 240
  9. 272
  10. 88
  11. 176
  12. 256
  13. 168
  14. 116
  15. 172
  16. 296
  17. 104
  18. 188
  19. 228
  20. 240
  21. 136
  22. 148
  23. 92
  24. 260
  25. 96
  26. 76
  27. 280
  28. 108
  29. 144
  30. 140
  31. 304
  32. 192
  33. 236
  34. 120
  35. 48
  36. 152
  37. 120
  38. 292
  39. 132
  40. 68

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