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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 427 · 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. 1.28 × 8 =
  2. 2.38 × 4 =
  3. 3.52 × 4 =
  4. 4.29 × 8 =
  5. 5.30 × 4 =
  6. 6.17 × 4 =
  7. 7.27 × 8 =
  8. 8.42 × 4 =
  9. 9.31 × 8 =
  10. 10.26 × 4 =
  11. 11.73 × 4 =
  12. 12.16 × 4 =
  13. 13.38 × 8 =
  14. 14.24 × 8 =
  15. 15.16 × 8 =
  16. 16.45 × 4 =
  17. 17.23 × 8 =
  18. 18.25 × 8 =
  19. 19.40 × 8 =
  20. 20.60 × 4 =
  21. 21.55 × 4 =
  22. 22.56 × 4 =
  23. 23.39 × 4 =
  24. 24.49 × 4 =
  25. 25.71 × 4 =
  26. 26.17 × 8 =
  27. 27.21 × 8 =
  28. 28.30 × 8 =
  29. 29.57 × 4 =
  30. 30.14 × 8 =
  31. 31.59 × 4 =
  32. 32.75 × 4 =
  33. 33.25 × 4 =
  34. 34.20 × 8 =
  35. 35.64 × 4 =
  36. 36.51 × 4 =
  37. 37.47 × 4 =
  38. 38.28 × 4 =
  39. 39.14 × 4 =
  40. 40.12 × 8 =

Answer key

  1. 224
  2. 152
  3. 208
  4. 232
  5. 120
  6. 68
  7. 216
  8. 168
  9. 248
  10. 104
  11. 292
  12. 64
  13. 304
  14. 192
  15. 128
  16. 180
  17. 184
  18. 200
  19. 320
  20. 240
  21. 220
  22. 224
  23. 156
  24. 196
  25. 284
  26. 136
  27. 168
  28. 240
  29. 228
  30. 112
  31. 236
  32. 300
  33. 100
  34. 160
  35. 256
  36. 204
  37. 188
  38. 112
  39. 56
  40. 96

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