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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 996 · 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. 1.46 × 4 =
  2. 2.34 × 8 =
  3. 3.23 × 4 =
  4. 4.21 × 4 =
  5. 5.33 × 4 =
  6. 6.60 × 4 =
  7. 7.15 × 4 =
  8. 8.15 × 8 =
  9. 9.29 × 4 =
  10. 10.37 × 8 =
  11. 11.57 × 4 =
  12. 12.53 × 4 =
  13. 13.31 × 8 =
  14. 14.22 × 8 =
  15. 15.12 × 4 =
  16. 16.28 × 8 =
  17. 17.14 × 8 =
  18. 18.42 × 4 =
  19. 19.31 × 4 =
  20. 20.21 × 8 =
  21. 21.19 × 8 =
  22. 22.29 × 8 =
  23. 23.23 × 8 =
  24. 24.26 × 8 =
  25. 25.49 × 4 =
  26. 26.54 × 4 =
  27. 27.27 × 8 =
  28. 28.74 × 4 =
  29. 29.35 × 8 =
  30. 30.63 × 4 =
  31. 31.17 × 4 =
  32. 32.18 × 8 =
  33. 33.47 × 4 =
  34. 34.38 × 8 =
  35. 35.22 × 4 =
  36. 36.30 × 8 =
  37. 37.20 × 8 =
  38. 38.72 × 4 =
  39. 39.16 × 4 =
  40. 40.25 × 8 =

Answer key

  1. 184
  2. 272
  3. 92
  4. 84
  5. 132
  6. 240
  7. 60
  8. 120
  9. 116
  10. 296
  11. 228
  12. 212
  13. 248
  14. 176
  15. 48
  16. 224
  17. 112
  18. 168
  19. 124
  20. 168
  21. 152
  22. 232
  23. 184
  24. 208
  25. 196
  26. 216
  27. 216
  28. 296
  29. 280
  30. 252
  31. 68
  32. 144
  33. 188
  34. 304
  35. 88
  36. 240
  37. 160
  38. 288
  39. 64
  40. 200

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