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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 328 · 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. 1.51 × 4 =
  2. 2.36 × 8 =
  3. 3.12 × 8 =
  4. 4.35 × 8 =
  5. 5.15 × 4 =
  6. 6.43 × 4 =
  7. 7.39 × 4 =
  8. 8.67 × 4 =
  9. 9.14 × 4 =
  10. 10.73 × 4 =
  11. 11.59 × 4 =
  12. 12.39 × 8 =
  13. 13.37 × 4 =
  14. 14.18 × 8 =
  15. 15.27 × 8 =
  16. 16.35 × 4 =
  17. 17.42 × 4 =
  18. 18.21 × 8 =
  19. 19.20 × 8 =
  20. 20.70 × 4 =
  21. 21.16 × 8 =
  22. 22.28 × 4 =
  23. 23.62 × 4 =
  24. 24.58 × 4 =
  25. 25.37 × 8 =
  26. 26.48 × 4 =
  27. 27.28 × 8 =
  28. 28.23 × 8 =
  29. 29.65 × 4 =
  30. 30.21 × 4 =
  31. 31.33 × 4 =
  32. 32.74 × 4 =
  33. 33.31 × 8 =
  34. 34.25 × 4 =
  35. 35.72 × 4 =
  36. 36.22 × 4 =
  37. 37.13 × 8 =
  38. 38.52 × 4 =
  39. 39.25 × 8 =
  40. 40.26 × 8 =

Answer key

  1. 204
  2. 288
  3. 96
  4. 280
  5. 60
  6. 172
  7. 156
  8. 268
  9. 56
  10. 292
  11. 236
  12. 312
  13. 148
  14. 144
  15. 216
  16. 140
  17. 168
  18. 168
  19. 160
  20. 280
  21. 128
  22. 112
  23. 248
  24. 232
  25. 296
  26. 192
  27. 224
  28. 184
  29. 260
  30. 84
  31. 132
  32. 296
  33. 248
  34. 100
  35. 288
  36. 88
  37. 104
  38. 208
  39. 200
  40. 208

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