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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 708 · 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. 1.19 × 8 =
  2. 2.13 × 8 =
  3. 3.69 × 4 =
  4. 4.39 × 8 =
  5. 5.27 × 8 =
  6. 6.25 × 4 =
  7. 7.36 × 4 =
  8. 8.15 × 4 =
  9. 9.26 × 8 =
  10. 10.31 × 8 =
  11. 11.39 × 4 =
  12. 12.46 × 4 =
  13. 13.18 × 8 =
  14. 14.49 × 4 =
  15. 15.38 × 8 =
  16. 16.52 × 4 =
  17. 17.24 × 8 =
  18. 18.63 × 4 =
  19. 19.28 × 4 =
  20. 20.18 × 4 =
  21. 21.30 × 8 =
  22. 22.50 × 4 =
  23. 23.12 × 4 =
  24. 24.17 × 8 =
  25. 25.31 × 4 =
  26. 26.37 × 4 =
  27. 27.38 × 4 =
  28. 28.57 × 4 =
  29. 29.20 × 8 =
  30. 30.40 × 8 =
  31. 31.21 × 8 =
  32. 32.33 × 8 =
  33. 33.29 × 8 =
  34. 34.28 × 8 =
  35. 35.20 × 4 =
  36. 36.15 × 8 =
  37. 37.22 × 8 =
  38. 38.64 × 4 =
  39. 39.36 × 8 =
  40. 40.17 × 4 =

Answer key

  1. 152
  2. 104
  3. 276
  4. 312
  5. 216
  6. 100
  7. 144
  8. 60
  9. 208
  10. 248
  11. 156
  12. 184
  13. 144
  14. 196
  15. 304
  16. 208
  17. 192
  18. 252
  19. 112
  20. 72
  21. 240
  22. 200
  23. 48
  24. 136
  25. 124
  26. 148
  27. 152
  28. 228
  29. 160
  30. 320
  31. 168
  32. 264
  33. 232
  34. 224
  35. 80
  36. 120
  37. 176
  38. 256
  39. 288
  40. 68

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