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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 969 · 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. 1.34 × 8 =
  2. 2.19 × 4 =
  3. 3.14 × 4 =
  4. 4.25 × 8 =
  5. 5.35 × 8 =
  6. 6.24 × 8 =
  7. 7.54 × 4 =
  8. 8.29 × 8 =
  9. 9.33 × 4 =
  10. 10.19 × 8 =
  11. 11.12 × 4 =
  12. 12.30 × 4 =
  13. 13.14 × 8 =
  14. 14.42 × 4 =
  15. 15.13 × 8 =
  16. 16.28 × 8 =
  17. 17.28 × 4 =
  18. 18.64 × 4 =
  19. 19.16 × 8 =
  20. 20.69 × 4 =
  21. 21.12 × 8 =
  22. 22.72 × 4 =
  23. 23.23 × 8 =
  24. 24.17 × 8 =
  25. 25.38 × 4 =
  26. 26.40 × 4 =
  27. 27.20 × 4 =
  28. 28.46 × 4 =
  29. 29.31 × 8 =
  30. 30.43 × 4 =
  31. 31.40 × 8 =
  32. 32.27 × 4 =
  33. 33.33 × 8 =
  34. 34.65 × 4 =
  35. 35.37 × 4 =
  36. 36.26 × 8 =
  37. 37.39 × 8 =
  38. 38.67 × 4 =
  39. 39.25 × 4 =
  40. 40.38 × 8 =

Answer key

  1. 272
  2. 76
  3. 56
  4. 200
  5. 280
  6. 192
  7. 216
  8. 232
  9. 132
  10. 152
  11. 48
  12. 120
  13. 112
  14. 168
  15. 104
  16. 224
  17. 112
  18. 256
  19. 128
  20. 276
  21. 96
  22. 288
  23. 184
  24. 136
  25. 152
  26. 160
  27. 80
  28. 184
  29. 248
  30. 172
  31. 320
  32. 108
  33. 264
  34. 260
  35. 148
  36. 208
  37. 312
  38. 268
  39. 100
  40. 304

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