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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 275 · 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. 2.24 × 8 =
  3. 3.12 × 8 =
  4. 4.52 × 4 =
  5. 5.70 × 4 =
  6. 6.38 × 8 =
  7. 7.25 × 8 =
  8. 8.63 × 4 =
  9. 9.26 × 4 =
  10. 10.20 × 4 =
  11. 11.19 × 8 =
  12. 12.36 × 8 =
  13. 13.17 × 4 =
  14. 14.56 × 4 =
  15. 15.67 × 4 =
  16. 16.35 × 8 =
  17. 17.23 × 8 =
  18. 18.57 × 4 =
  19. 19.22 × 4 =
  20. 20.53 × 4 =
  21. 21.41 × 4 =
  22. 22.49 × 4 =
  23. 23.19 × 4 =
  24. 24.26 × 8 =
  25. 25.29 × 4 =
  26. 26.14 × 4 =
  27. 27.44 × 4 =
  28. 28.13 × 4 =
  29. 29.73 × 4 =
  30. 30.28 × 4 =
  31. 31.39 × 4 =
  32. 32.28 × 8 =
  33. 33.40 × 8 =
  34. 34.75 × 4 =
  35. 35.47 × 4 =
  36. 36.54 × 4 =
  37. 37.40 × 4 =
  38. 38.74 × 4 =
  39. 39.59 × 4 =
  40. 40.18 × 8 =

Answer key

  1. 312
  2. 192
  3. 96
  4. 208
  5. 280
  6. 304
  7. 200
  8. 252
  9. 104
  10. 80
  11. 152
  12. 288
  13. 68
  14. 224
  15. 268
  16. 280
  17. 184
  18. 228
  19. 88
  20. 212
  21. 164
  22. 196
  23. 76
  24. 208
  25. 116
  26. 56
  27. 176
  28. 52
  29. 292
  30. 112
  31. 156
  32. 224
  33. 320
  34. 300
  35. 188
  36. 216
  37. 160
  38. 296
  39. 236
  40. 144

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