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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 223 · 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 × 8 =
  2. 2.23 × 8 =
  3. 3.15 × 4 =
  4. 4.42 × 4 =
  5. 5.12 × 8 =
  6. 6.44 × 4 =
  7. 7.31 × 4 =
  8. 8.20 × 8 =
  9. 9.21 × 8 =
  10. 10.56 × 4 =
  11. 11.34 × 8 =
  12. 12.30 × 4 =
  13. 13.37 × 4 =
  14. 14.28 × 4 =
  15. 15.13 × 4 =
  16. 16.29 × 4 =
  17. 17.31 × 8 =
  18. 18.73 × 4 =
  19. 19.24 × 8 =
  20. 20.33 × 4 =
  21. 21.32 × 4 =
  22. 22.75 × 4 =
  23. 23.72 × 4 =
  24. 24.22 × 8 =
  25. 25.27 × 8 =
  26. 26.17 × 4 =
  27. 27.14 × 8 =
  28. 28.35 × 8 =
  29. 29.67 × 4 =
  30. 30.61 × 4 =
  31. 31.65 × 4 =
  32. 32.27 × 4 =
  33. 33.28 × 8 =
  34. 34.25 × 4 =
  35. 35.38 × 8 =
  36. 36.41 × 4 =
  37. 37.14 × 4 =
  38. 38.32 × 8 =
  39. 39.63 × 4 =
  40. 40.45 × 4 =

Answer key

  1. 240
  2. 184
  3. 60
  4. 168
  5. 96
  6. 176
  7. 124
  8. 160
  9. 168
  10. 224
  11. 272
  12. 120
  13. 148
  14. 112
  15. 52
  16. 116
  17. 248
  18. 292
  19. 192
  20. 132
  21. 128
  22. 300
  23. 288
  24. 176
  25. 216
  26. 68
  27. 112
  28. 280
  29. 268
  30. 244
  31. 260
  32. 108
  33. 224
  34. 100
  35. 304
  36. 164
  37. 56
  38. 256
  39. 252
  40. 180

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