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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 786 · 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. 1.12 × 8 =
  2. 2.37 × 4 =
  3. 3.29 × 8 =
  4. 4.21 × 8 =
  5. 5.45 × 4 =
  6. 6.68 × 4 =
  7. 7.44 × 4 =
  8. 8.72 × 4 =
  9. 9.54 × 4 =
  10. 10.56 × 4 =
  11. 11.15 × 8 =
  12. 12.39 × 4 =
  13. 13.30 × 4 =
  14. 14.67 × 4 =
  15. 15.21 × 4 =
  16. 16.13 × 8 =
  17. 17.49 × 4 =
  18. 18.28 × 8 =
  19. 19.14 × 8 =
  20. 20.48 × 4 =
  21. 21.40 × 8 =
  22. 22.62 × 4 =
  23. 23.16 × 4 =
  24. 24.70 × 4 =
  25. 25.16 × 8 =
  26. 26.32 × 8 =
  27. 27.33 × 4 =
  28. 28.65 × 4 =
  29. 29.19 × 8 =
  30. 30.23 × 4 =
  31. 31.15 × 4 =
  32. 32.32 × 4 =
  33. 33.25 × 4 =
  34. 34.42 × 4 =
  35. 35.24 × 4 =
  36. 36.59 × 4 =
  37. 37.66 × 4 =
  38. 38.40 × 4 =
  39. 39.34 × 8 =
  40. 40.30 × 8 =

Answer key

  1. 96
  2. 148
  3. 232
  4. 168
  5. 180
  6. 272
  7. 176
  8. 288
  9. 216
  10. 224
  11. 120
  12. 156
  13. 120
  14. 268
  15. 84
  16. 104
  17. 196
  18. 224
  19. 112
  20. 192
  21. 320
  22. 248
  23. 64
  24. 280
  25. 128
  26. 256
  27. 132
  28. 260
  29. 152
  30. 92
  31. 60
  32. 128
  33. 100
  34. 168
  35. 96
  36. 236
  37. 264
  38. 160
  39. 272
  40. 240

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