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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 709 · 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. 2.57 × 4 =
  3. 3.64 × 4 =
  4. 4.50 × 4 =
  5. 5.20 × 4 =
  6. 6.71 × 4 =
  7. 7.44 × 4 =
  8. 8.61 × 4 =
  9. 9.19 × 8 =
  10. 10.18 × 4 =
  11. 11.73 × 4 =
  12. 12.41 × 4 =
  13. 13.21 × 8 =
  14. 14.37 × 8 =
  15. 15.72 × 4 =
  16. 16.30 × 4 =
  17. 17.22 × 8 =
  18. 18.17 × 8 =
  19. 19.74 × 4 =
  20. 20.49 × 4 =
  21. 21.12 × 8 =
  22. 22.47 × 4 =
  23. 23.65 × 4 =
  24. 24.42 × 4 =
  25. 25.29 × 4 =
  26. 26.39 × 8 =
  27. 27.36 × 4 =
  28. 28.30 × 8 =
  29. 29.24 × 8 =
  30. 30.40 × 8 =
  31. 31.23 × 8 =
  32. 32.35 × 8 =
  33. 33.32 × 4 =
  34. 34.14 × 8 =
  35. 35.27 × 4 =
  36. 36.16 × 4 =
  37. 37.34 × 4 =
  38. 38.62 × 4 =
  39. 39.40 × 4 =
  40. 40.13 × 8 =

Answer key

  1. 144
  2. 228
  3. 256
  4. 200
  5. 80
  6. 284
  7. 176
  8. 244
  9. 152
  10. 72
  11. 292
  12. 164
  13. 168
  14. 296
  15. 288
  16. 120
  17. 176
  18. 136
  19. 296
  20. 196
  21. 96
  22. 188
  23. 260
  24. 168
  25. 116
  26. 312
  27. 144
  28. 240
  29. 192
  30. 320
  31. 184
  32. 280
  33. 128
  34. 112
  35. 108
  36. 64
  37. 136
  38. 248
  39. 160
  40. 104

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