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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 856 · 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. 1.30 × 8 =
  2. 2.68 × 4 =
  3. 3.25 × 8 =
  4. 4.35 × 8 =
  5. 5.33 × 8 =
  6. 6.15 × 4 =
  7. 7.21 × 4 =
  8. 8.29 × 8 =
  9. 9.52 × 4 =
  10. 10.38 × 8 =
  11. 11.23 × 8 =
  12. 12.36 × 8 =
  13. 13.21 × 8 =
  14. 14.14 × 8 =
  15. 15.46 × 4 =
  16. 16.28 × 8 =
  17. 17.56 × 4 =
  18. 18.12 × 8 =
  19. 19.32 × 8 =
  20. 20.71 × 4 =
  21. 21.12 × 4 =
  22. 22.25 × 4 =
  23. 23.63 × 4 =
  24. 24.31 × 8 =
  25. 25.67 × 4 =
  26. 26.24 × 8 =
  27. 27.39 × 4 =
  28. 28.13 × 8 =
  29. 29.48 × 4 =
  30. 30.57 × 4 =
  31. 31.43 × 4 =
  32. 32.13 × 4 =
  33. 33.26 × 8 =
  34. 34.58 × 4 =
  35. 35.19 × 8 =
  36. 36.26 × 4 =
  37. 37.69 × 4 =
  38. 38.32 × 4 =
  39. 39.22 × 4 =
  40. 40.55 × 4 =

Answer key

  1. 240
  2. 272
  3. 200
  4. 280
  5. 264
  6. 60
  7. 84
  8. 232
  9. 208
  10. 304
  11. 184
  12. 288
  13. 168
  14. 112
  15. 184
  16. 224
  17. 224
  18. 96
  19. 256
  20. 284
  21. 48
  22. 100
  23. 252
  24. 248
  25. 268
  26. 192
  27. 156
  28. 104
  29. 192
  30. 228
  31. 172
  32. 52
  33. 208
  34. 232
  35. 152
  36. 104
  37. 276
  38. 128
  39. 88
  40. 220

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