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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 720 · 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. 2.51 × 4 =
  3. 3.52 × 4 =
  4. 4.15 × 8 =
  5. 5.20 × 8 =
  6. 6.16 × 8 =
  7. 7.21 × 8 =
  8. 8.35 × 4 =
  9. 9.67 × 4 =
  10. 10.44 × 4 =
  11. 11.36 × 8 =
  12. 12.55 × 4 =
  13. 13.37 × 8 =
  14. 14.17 × 8 =
  15. 15.62 × 4 =
  16. 16.34 × 8 =
  17. 17.12 × 4 =
  18. 18.27 × 8 =
  19. 19.24 × 8 =
  20. 20.22 × 8 =
  21. 21.43 × 4 =
  22. 22.47 × 4 =
  23. 23.35 × 8 =
  24. 24.60 × 4 =
  25. 25.26 × 8 =
  26. 26.46 × 4 =
  27. 27.22 × 4 =
  28. 28.40 × 8 =
  29. 29.20 × 4 =
  30. 30.38 × 8 =
  31. 31.59 × 4 =
  32. 32.37 × 4 =
  33. 33.25 × 8 =
  34. 34.12 × 8 =
  35. 35.40 × 4 =
  36. 36.39 × 8 =
  37. 37.33 × 4 =
  38. 38.68 × 4 =
  39. 39.32 × 4 =
  40. 40.26 × 4 =

Answer key

  1. 224
  2. 204
  3. 208
  4. 120
  5. 160
  6. 128
  7. 168
  8. 140
  9. 268
  10. 176
  11. 288
  12. 220
  13. 296
  14. 136
  15. 248
  16. 272
  17. 48
  18. 216
  19. 192
  20. 176
  21. 172
  22. 188
  23. 280
  24. 240
  25. 208
  26. 184
  27. 88
  28. 320
  29. 80
  30. 304
  31. 236
  32. 148
  33. 200
  34. 96
  35. 160
  36. 312
  37. 132
  38. 272
  39. 128
  40. 104

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