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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 699 · 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. 1.73 × 4 =
  2. 2.15 × 8 =
  3. 3.47 × 4 =
  4. 4.32 × 4 =
  5. 5.34 × 4 =
  6. 6.46 × 4 =
  7. 7.70 × 4 =
  8. 8.12 × 4 =
  9. 9.14 × 4 =
  10. 10.12 × 8 =
  11. 11.13 × 8 =
  12. 12.14 × 8 =
  13. 13.39 × 8 =
  14. 14.62 × 4 =
  15. 15.66 × 4 =
  16. 16.65 × 4 =
  17. 17.57 × 4 =
  18. 18.59 × 4 =
  19. 19.61 × 4 =
  20. 20.39 × 4 =
  21. 21.16 × 8 =
  22. 22.27 × 8 =
  23. 23.18 × 8 =
  24. 24.50 × 4 =
  25. 25.28 × 4 =
  26. 26.34 × 8 =
  27. 27.21 × 8 =
  28. 28.23 × 8 =
  29. 29.56 × 4 =
  30. 30.55 × 4 =
  31. 31.29 × 8 =
  32. 32.24 × 4 =
  33. 33.31 × 4 =
  34. 34.71 × 4 =
  35. 35.21 × 4 =
  36. 36.26 × 8 =
  37. 37.24 × 8 =
  38. 38.42 × 4 =
  39. 39.37 × 4 =
  40. 40.32 × 8 =

Answer key

  1. 292
  2. 120
  3. 188
  4. 128
  5. 136
  6. 184
  7. 280
  8. 48
  9. 56
  10. 96
  11. 104
  12. 112
  13. 312
  14. 248
  15. 264
  16. 260
  17. 228
  18. 236
  19. 244
  20. 156
  21. 128
  22. 216
  23. 144
  24. 200
  25. 112
  26. 272
  27. 168
  28. 184
  29. 224
  30. 220
  31. 232
  32. 96
  33. 124
  34. 284
  35. 84
  36. 208
  37. 192
  38. 168
  39. 148
  40. 256

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