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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 576 · 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. 1.37 × 4 =
  2. 2.38 × 8 =
  3. 3.62 × 4 =
  4. 4.67 × 4 =
  5. 5.19 × 8 =
  6. 6.28 × 4 =
  7. 7.21 × 4 =
  8. 8.31 × 8 =
  9. 9.13 × 8 =
  10. 10.29 × 8 =
  11. 11.17 × 4 =
  12. 12.24 × 8 =
  13. 13.19 × 4 =
  14. 14.16 × 4 =
  15. 15.36 × 4 =
  16. 16.18 × 8 =
  17. 17.14 × 8 =
  18. 18.30 × 4 =
  19. 19.27 × 8 =
  20. 20.55 × 4 =
  21. 21.34 × 8 =
  22. 22.36 × 8 =
  23. 23.31 × 4 =
  24. 24.12 × 8 =
  25. 25.39 × 8 =
  26. 26.50 × 4 =
  27. 27.29 × 4 =
  28. 28.65 × 4 =
  29. 29.22 × 8 =
  30. 30.32 × 4 =
  31. 31.35 × 4 =
  32. 32.56 × 4 =
  33. 33.46 × 4 =
  34. 34.15 × 8 =
  35. 35.70 × 4 =
  36. 36.57 × 4 =
  37. 37.22 × 4 =
  38. 38.69 × 4 =
  39. 39.41 × 4 =
  40. 40.37 × 8 =

Answer key

  1. 148
  2. 304
  3. 248
  4. 268
  5. 152
  6. 112
  7. 84
  8. 248
  9. 104
  10. 232
  11. 68
  12. 192
  13. 76
  14. 64
  15. 144
  16. 144
  17. 112
  18. 120
  19. 216
  20. 220
  21. 272
  22. 288
  23. 124
  24. 96
  25. 312
  26. 200
  27. 116
  28. 260
  29. 176
  30. 128
  31. 140
  32. 224
  33. 184
  34. 120
  35. 280
  36. 228
  37. 88
  38. 276
  39. 164
  40. 296

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