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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 198 · 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. 1.56 × 4 =
  2. 2.33 × 8 =
  3. 3.48 × 4 =
  4. 4.17 × 4 =
  5. 5.14 × 4 =
  6. 6.38 × 8 =
  7. 7.32 × 4 =
  8. 8.71 × 4 =
  9. 9.39 × 8 =
  10. 10.23 × 4 =
  11. 11.52 × 4 =
  12. 12.22 × 8 =
  13. 13.23 × 8 =
  14. 14.31 × 8 =
  15. 15.17 × 8 =
  16. 16.50 × 4 =
  17. 17.24 × 4 =
  18. 18.43 × 4 =
  19. 19.34 × 4 =
  20. 20.16 × 8 =
  21. 21.36 × 4 =
  22. 22.72 × 4 =
  23. 23.35 × 4 =
  24. 24.27 × 8 =
  25. 25.57 × 4 =
  26. 26.61 × 4 =
  27. 27.13 × 4 =
  28. 28.69 × 4 =
  29. 29.33 × 4 =
  30. 30.18 × 8 =
  31. 31.24 × 8 =
  32. 32.36 × 8 =
  33. 33.25 × 8 =
  34. 34.28 × 8 =
  35. 35.55 × 4 =
  36. 36.34 × 8 =
  37. 37.68 × 4 =
  38. 38.15 × 8 =
  39. 39.58 × 4 =
  40. 40.65 × 4 =

Answer key

  1. 224
  2. 264
  3. 192
  4. 68
  5. 56
  6. 304
  7. 128
  8. 284
  9. 312
  10. 92
  11. 208
  12. 176
  13. 184
  14. 248
  15. 136
  16. 200
  17. 96
  18. 172
  19. 136
  20. 128
  21. 144
  22. 288
  23. 140
  24. 216
  25. 228
  26. 244
  27. 52
  28. 276
  29. 132
  30. 144
  31. 192
  32. 288
  33. 200
  34. 224
  35. 220
  36. 272
  37. 272
  38. 120
  39. 232
  40. 260

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