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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 963 · 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 × 4 =
  2. 2.40 × 8 =
  3. 3.19 × 8 =
  4. 4.20 × 8 =
  5. 5.12 × 8 =
  6. 6.49 × 4 =
  7. 7.39 × 8 =
  8. 8.48 × 4 =
  9. 9.24 × 4 =
  10. 10.59 × 4 =
  11. 11.27 × 8 =
  12. 12.25 × 4 =
  13. 13.33 × 8 =
  14. 14.60 × 4 =
  15. 15.23 × 8 =
  16. 16.14 × 4 =
  17. 17.28 × 4 =
  18. 18.31 × 8 =
  19. 19.35 × 8 =
  20. 20.26 × 8 =
  21. 21.73 × 4 =
  22. 22.28 × 8 =
  23. 23.61 × 4 =
  24. 24.25 × 8 =
  25. 25.67 × 4 =
  26. 26.70 × 4 =
  27. 27.39 × 4 =
  28. 28.54 × 4 =
  29. 29.53 × 4 =
  30. 30.26 × 4 =
  31. 31.36 × 4 =
  32. 32.14 × 8 =
  33. 33.35 × 4 =
  34. 34.13 × 8 =
  35. 35.23 × 4 =
  36. 36.34 × 8 =
  37. 37.55 × 4 =
  38. 38.21 × 4 =
  39. 39.68 × 4 =
  40. 40.51 × 4 =

Answer key

  1. 120
  2. 320
  3. 152
  4. 160
  5. 96
  6. 196
  7. 312
  8. 192
  9. 96
  10. 236
  11. 216
  12. 100
  13. 264
  14. 240
  15. 184
  16. 56
  17. 112
  18. 248
  19. 280
  20. 208
  21. 292
  22. 224
  23. 244
  24. 200
  25. 268
  26. 280
  27. 156
  28. 216
  29. 212
  30. 104
  31. 144
  32. 112
  33. 140
  34. 104
  35. 92
  36. 272
  37. 220
  38. 84
  39. 272
  40. 204

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