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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 205 · 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. 1.16 × 8 =
  2. 2.51 × 4 =
  3. 3.48 × 4 =
  4. 4.22 × 8 =
  5. 5.13 × 8 =
  6. 6.71 × 4 =
  7. 7.56 × 4 =
  8. 8.38 × 8 =
  9. 9.14 × 8 =
  10. 10.27 × 8 =
  11. 11.24 × 4 =
  12. 12.24 × 8 =
  13. 13.49 × 4 =
  14. 14.18 × 4 =
  15. 15.42 × 4 =
  16. 16.30 × 4 =
  17. 17.46 × 4 =
  18. 18.16 × 4 =
  19. 19.30 × 8 =
  20. 20.53 × 4 =
  21. 21.25 × 8 =
  22. 22.34 × 8 =
  23. 23.26 × 4 =
  24. 24.35 × 4 =
  25. 25.55 × 4 =
  26. 26.54 × 4 =
  27. 27.18 × 8 =
  28. 28.12 × 4 =
  29. 29.28 × 8 =
  30. 30.32 × 8 =
  31. 31.35 × 8 =
  32. 32.23 × 4 =
  33. 33.19 × 4 =
  34. 34.37 × 8 =
  35. 35.57 × 4 =
  36. 36.72 × 4 =
  37. 37.45 × 4 =
  38. 38.59 × 4 =
  39. 39.23 × 8 =
  40. 40.50 × 4 =

Answer key

  1. 128
  2. 204
  3. 192
  4. 176
  5. 104
  6. 284
  7. 224
  8. 304
  9. 112
  10. 216
  11. 96
  12. 192
  13. 196
  14. 72
  15. 168
  16. 120
  17. 184
  18. 64
  19. 240
  20. 212
  21. 200
  22. 272
  23. 104
  24. 140
  25. 220
  26. 216
  27. 144
  28. 48
  29. 224
  30. 256
  31. 280
  32. 92
  33. 76
  34. 296
  35. 228
  36. 288
  37. 180
  38. 236
  39. 184
  40. 200

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