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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 428 · 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. 1.18 × 8 =
  2. 2.65 × 4 =
  3. 3.47 × 4 =
  4. 4.14 × 8 =
  5. 5.28 × 8 =
  6. 6.33 × 4 =
  7. 7.29 × 4 =
  8. 8.53 × 4 =
  9. 9.27 × 8 =
  10. 10.17 × 8 =
  11. 11.49 × 4 =
  12. 12.25 × 4 =
  13. 13.20 × 4 =
  14. 14.36 × 8 =
  15. 15.22 × 8 =
  16. 16.63 × 4 =
  17. 17.32 × 4 =
  18. 18.74 × 4 =
  19. 19.34 × 8 =
  20. 20.20 × 8 =
  21. 21.16 × 4 =
  22. 22.26 × 4 =
  23. 23.31 × 4 =
  24. 24.54 × 4 =
  25. 25.13 × 8 =
  26. 26.31 × 8 =
  27. 27.35 × 8 =
  28. 28.45 × 4 =
  29. 29.38 × 8 =
  30. 30.32 × 8 =
  31. 31.13 × 4 =
  32. 32.66 × 4 =
  33. 33.38 × 4 =
  34. 34.57 × 4 =
  35. 35.12 × 4 =
  36. 36.26 × 8 =
  37. 37.30 × 8 =
  38. 38.46 × 4 =
  39. 39.37 × 8 =
  40. 40.71 × 4 =

Answer key

  1. 144
  2. 260
  3. 188
  4. 112
  5. 224
  6. 132
  7. 116
  8. 212
  9. 216
  10. 136
  11. 196
  12. 100
  13. 80
  14. 288
  15. 176
  16. 252
  17. 128
  18. 296
  19. 272
  20. 160
  21. 64
  22. 104
  23. 124
  24. 216
  25. 104
  26. 248
  27. 280
  28. 180
  29. 304
  30. 256
  31. 52
  32. 264
  33. 152
  34. 228
  35. 48
  36. 208
  37. 240
  38. 184
  39. 296
  40. 284

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