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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 919 · 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. 1.62 × 4 =
  2. 2.27 × 8 =
  3. 3.33 × 4 =
  4. 4.73 × 4 =
  5. 5.38 × 8 =
  6. 6.49 × 4 =
  7. 7.17 × 8 =
  8. 8.28 × 8 =
  9. 9.35 × 8 =
  10. 10.33 × 8 =
  11. 11.13 × 8 =
  12. 12.67 × 4 =
  13. 13.21 × 8 =
  14. 14.32 × 8 =
  15. 15.64 × 4 =
  16. 16.46 × 4 =
  17. 17.18 × 8 =
  18. 18.24 × 8 =
  19. 19.25 × 8 =
  20. 20.12 × 8 =
  21. 21.39 × 4 =
  22. 22.54 × 4 =
  23. 23.19 × 4 =
  24. 24.35 × 4 =
  25. 25.59 × 4 =
  26. 26.15 × 8 =
  27. 27.20 × 8 =
  28. 28.72 × 4 =
  29. 29.30 × 4 =
  30. 30.22 × 8 =
  31. 31.57 × 4 =
  32. 32.29 × 4 =
  33. 33.16 × 8 =
  34. 34.58 × 4 =
  35. 35.17 × 4 =
  36. 36.51 × 4 =
  37. 37.34 × 4 =
  38. 38.75 × 4 =
  39. 39.74 × 4 =
  40. 40.45 × 4 =

Answer key

  1. 248
  2. 216
  3. 132
  4. 292
  5. 304
  6. 196
  7. 136
  8. 224
  9. 280
  10. 264
  11. 104
  12. 268
  13. 168
  14. 256
  15. 256
  16. 184
  17. 144
  18. 192
  19. 200
  20. 96
  21. 156
  22. 216
  23. 76
  24. 140
  25. 236
  26. 120
  27. 160
  28. 288
  29. 120
  30. 176
  31. 228
  32. 116
  33. 128
  34. 232
  35. 68
  36. 204
  37. 136
  38. 300
  39. 296
  40. 180

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