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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 302 · 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. 2.23 × 8 =
  3. 3.65 × 4 =
  4. 4.67 × 4 =
  5. 5.22 × 4 =
  6. 6.24 × 8 =
  7. 7.29 × 8 =
  8. 8.39 × 8 =
  9. 9.21 × 8 =
  10. 10.17 × 8 =
  11. 11.44 × 4 =
  12. 12.13 × 4 =
  13. 13.58 × 4 =
  14. 14.47 × 4 =
  15. 15.16 × 8 =
  16. 16.40 × 4 =
  17. 17.15 × 8 =
  18. 18.33 × 4 =
  19. 19.37 × 8 =
  20. 20.18 × 8 =
  21. 21.18 × 4 =
  22. 22.30 × 8 =
  23. 23.45 × 4 =
  24. 24.68 × 4 =
  25. 25.23 × 4 =
  26. 26.19 × 8 =
  27. 27.17 × 4 =
  28. 28.12 × 4 =
  29. 29.28 × 8 =
  30. 30.38 × 4 =
  31. 31.72 × 4 =
  32. 32.16 × 4 =
  33. 33.64 × 4 =
  34. 34.54 × 4 =
  35. 35.26 × 4 =
  36. 36.57 × 4 =
  37. 37.32 × 8 =
  38. 38.12 × 8 =
  39. 39.31 × 8 =
  40. 40.38 × 8 =

Answer key

  1. 104
  2. 184
  3. 260
  4. 268
  5. 88
  6. 192
  7. 232
  8. 312
  9. 168
  10. 136
  11. 176
  12. 52
  13. 232
  14. 188
  15. 128
  16. 160
  17. 120
  18. 132
  19. 296
  20. 144
  21. 72
  22. 240
  23. 180
  24. 272
  25. 92
  26. 152
  27. 68
  28. 48
  29. 224
  30. 152
  31. 288
  32. 64
  33. 256
  34. 216
  35. 104
  36. 228
  37. 256
  38. 96
  39. 248
  40. 304

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