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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 273 · 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. 1.14 × 8 =
  2. 2.34 × 4 =
  3. 3.24 × 4 =
  4. 4.36 × 4 =
  5. 5.49 × 4 =
  6. 6.12 × 8 =
  7. 7.26 × 4 =
  8. 8.40 × 8 =
  9. 9.31 × 8 =
  10. 10.62 × 4 =
  11. 11.31 × 4 =
  12. 12.15 × 8 =
  13. 13.15 × 4 =
  14. 14.23 × 4 =
  15. 15.19 × 8 =
  16. 16.53 × 4 =
  17. 17.59 × 4 =
  18. 18.75 × 4 =
  19. 19.25 × 4 =
  20. 20.21 × 8 =
  21. 21.27 × 8 =
  22. 22.22 × 8 =
  23. 23.57 × 4 =
  24. 24.40 × 4 =
  25. 25.69 × 4 =
  26. 26.26 × 8 =
  27. 27.30 × 8 =
  28. 28.35 × 4 =
  29. 29.19 × 4 =
  30. 30.38 × 8 =
  31. 31.30 × 4 =
  32. 32.37 × 4 =
  33. 33.63 × 4 =
  34. 34.20 × 4 =
  35. 35.56 × 4 =
  36. 36.18 × 8 =
  37. 37.54 × 4 =
  38. 38.38 × 4 =
  39. 39.32 × 8 =
  40. 40.33 × 8 =

Answer key

  1. 112
  2. 136
  3. 96
  4. 144
  5. 196
  6. 96
  7. 104
  8. 320
  9. 248
  10. 248
  11. 124
  12. 120
  13. 60
  14. 92
  15. 152
  16. 212
  17. 236
  18. 300
  19. 100
  20. 168
  21. 216
  22. 176
  23. 228
  24. 160
  25. 276
  26. 208
  27. 240
  28. 140
  29. 76
  30. 304
  31. 120
  32. 148
  33. 252
  34. 80
  35. 224
  36. 144
  37. 216
  38. 152
  39. 256
  40. 264

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