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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 654 · 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. 1.13 × 8 =
  2. 2.34 × 8 =
  3. 3.16 × 8 =
  4. 4.35 × 8 =
  5. 5.74 × 4 =
  6. 6.17 × 8 =
  7. 7.19 × 8 =
  8. 8.40 × 8 =
  9. 9.13 × 4 =
  10. 10.43 × 4 =
  11. 11.12 × 8 =
  12. 12.67 × 4 =
  13. 13.50 × 4 =
  14. 14.56 × 4 =
  15. 15.28 × 8 =
  16. 16.12 × 4 =
  17. 17.36 × 4 =
  18. 18.33 × 8 =
  19. 19.65 × 4 =
  20. 20.32 × 8 =
  21. 21.40 × 4 =
  22. 22.29 × 8 =
  23. 23.57 × 4 =
  24. 24.23 × 8 =
  25. 25.23 × 4 =
  26. 26.19 × 4 =
  27. 27.38 × 8 =
  28. 28.32 × 4 =
  29. 29.24 × 8 =
  30. 30.37 × 8 =
  31. 31.18 × 8 =
  32. 32.28 × 4 =
  33. 33.31 × 8 =
  34. 34.15 × 4 =
  35. 35.62 × 4 =
  36. 36.20 × 4 =
  37. 37.14 × 8 =
  38. 38.55 × 4 =
  39. 39.34 × 4 =
  40. 40.36 × 8 =

Answer key

  1. 104
  2. 272
  3. 128
  4. 280
  5. 296
  6. 136
  7. 152
  8. 320
  9. 52
  10. 172
  11. 96
  12. 268
  13. 200
  14. 224
  15. 224
  16. 48
  17. 144
  18. 264
  19. 260
  20. 256
  21. 160
  22. 232
  23. 228
  24. 184
  25. 92
  26. 76
  27. 304
  28. 128
  29. 192
  30. 296
  31. 144
  32. 112
  33. 248
  34. 60
  35. 248
  36. 80
  37. 112
  38. 220
  39. 136
  40. 288

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