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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 986 · 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. 1.43 × 4 =
  2. 2.32 × 8 =
  3. 3.31 × 8 =
  4. 4.13 × 4 =
  5. 5.34 × 8 =
  6. 6.39 × 8 =
  7. 7.16 × 4 =
  8. 8.14 × 8 =
  9. 9.22 × 4 =
  10. 10.70 × 4 =
  11. 11.36 × 8 =
  12. 12.40 × 4 =
  13. 13.50 × 4 =
  14. 14.39 × 4 =
  15. 15.26 × 8 =
  16. 16.25 × 8 =
  17. 17.16 × 8 =
  18. 18.19 × 8 =
  19. 19.19 × 4 =
  20. 20.33 × 4 =
  21. 21.56 × 4 =
  22. 22.60 × 4 =
  23. 23.20 × 8 =
  24. 24.45 × 4 =
  25. 25.65 × 4 =
  26. 26.21 × 8 =
  27. 27.17 × 8 =
  28. 28.23 × 4 =
  29. 29.29 × 4 =
  30. 30.74 × 4 =
  31. 31.46 × 4 =
  32. 32.36 × 4 =
  33. 33.66 × 4 =
  34. 34.48 × 4 =
  35. 35.28 × 8 =
  36. 36.67 × 4 =
  37. 37.28 × 4 =
  38. 38.25 × 4 =
  39. 39.17 × 4 =
  40. 40.22 × 8 =

Answer key

  1. 172
  2. 256
  3. 248
  4. 52
  5. 272
  6. 312
  7. 64
  8. 112
  9. 88
  10. 280
  11. 288
  12. 160
  13. 200
  14. 156
  15. 208
  16. 200
  17. 128
  18. 152
  19. 76
  20. 132
  21. 224
  22. 240
  23. 160
  24. 180
  25. 260
  26. 168
  27. 136
  28. 92
  29. 116
  30. 296
  31. 184
  32. 144
  33. 264
  34. 192
  35. 224
  36. 268
  37. 112
  38. 100
  39. 68
  40. 176

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