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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 777 · 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. 1.30 × 8 =
  2. 2.38 × 8 =
  3. 3.75 × 4 =
  4. 4.45 × 4 =
  5. 5.58 × 4 =
  6. 6.62 × 4 =
  7. 7.23 × 4 =
  8. 8.27 × 4 =
  9. 9.57 × 4 =
  10. 10.14 × 8 =
  11. 11.28 × 8 =
  12. 12.24 × 8 =
  13. 13.67 × 4 =
  14. 14.52 × 4 =
  15. 15.12 × 8 =
  16. 16.59 × 4 =
  17. 17.74 × 4 =
  18. 18.43 × 4 =
  19. 19.39 × 4 =
  20. 20.32 × 8 =
  21. 21.34 × 8 =
  22. 22.39 × 8 =
  23. 23.37 × 8 =
  24. 24.12 × 4 =
  25. 25.35 × 4 =
  26. 26.72 × 4 =
  27. 27.48 × 4 =
  28. 28.16 × 8 =
  29. 29.69 × 4 =
  30. 30.15 × 8 =
  31. 31.37 × 4 =
  32. 32.70 × 4 =
  33. 33.24 × 4 =
  34. 34.66 × 4 =
  35. 35.13 × 8 =
  36. 36.33 × 4 =
  37. 37.22 × 8 =
  38. 38.17 × 8 =
  39. 39.27 × 8 =
  40. 40.23 × 8 =

Answer key

  1. 240
  2. 304
  3. 300
  4. 180
  5. 232
  6. 248
  7. 92
  8. 108
  9. 228
  10. 112
  11. 224
  12. 192
  13. 268
  14. 208
  15. 96
  16. 236
  17. 296
  18. 172
  19. 156
  20. 256
  21. 272
  22. 312
  23. 296
  24. 48
  25. 140
  26. 288
  27. 192
  28. 128
  29. 276
  30. 120
  31. 148
  32. 280
  33. 96
  34. 264
  35. 104
  36. 132
  37. 176
  38. 136
  39. 216
  40. 184

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