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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 423 · 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. 1.20 × 8 =
  2. 2.33 × 4 =
  3. 3.12 × 8 =
  4. 4.19 × 4 =
  5. 5.28 × 4 =
  6. 6.38 × 4 =
  7. 7.35 × 4 =
  8. 8.72 × 4 =
  9. 9.39 × 4 =
  10. 10.65 × 4 =
  11. 11.68 × 4 =
  12. 12.54 × 4 =
  13. 13.14 × 4 =
  14. 14.25 × 8 =
  15. 15.35 × 8 =
  16. 16.17 × 8 =
  17. 17.26 × 8 =
  18. 18.44 × 4 =
  19. 19.15 × 8 =
  20. 20.57 × 4 =
  21. 21.21 × 4 =
  22. 22.67 × 4 =
  23. 23.41 × 4 =
  24. 24.56 × 4 =
  25. 25.34 × 4 =
  26. 26.19 × 8 =
  27. 27.15 × 4 =
  28. 28.43 × 4 =
  29. 29.49 × 4 =
  30. 30.36 × 4 =
  31. 31.30 × 8 =
  32. 32.58 × 4 =
  33. 33.42 × 4 =
  34. 34.24 × 8 =
  35. 35.30 × 4 =
  36. 36.71 × 4 =
  37. 37.13 × 4 =
  38. 38.18 × 8 =
  39. 39.29 × 8 =
  40. 40.73 × 4 =

Answer key

  1. 160
  2. 132
  3. 96
  4. 76
  5. 112
  6. 152
  7. 140
  8. 288
  9. 156
  10. 260
  11. 272
  12. 216
  13. 56
  14. 200
  15. 280
  16. 136
  17. 208
  18. 176
  19. 120
  20. 228
  21. 84
  22. 268
  23. 164
  24. 224
  25. 136
  26. 152
  27. 60
  28. 172
  29. 196
  30. 144
  31. 240
  32. 232
  33. 168
  34. 192
  35. 120
  36. 284
  37. 52
  38. 144
  39. 232
  40. 292

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