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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 727 · 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. 1.22 × 8 =
  2. 2.30 × 4 =
  3. 3.32 × 8 =
  4. 4.25 × 8 =
  5. 5.37 × 4 =
  6. 6.49 × 4 =
  7. 7.28 × 8 =
  8. 8.61 × 4 =
  9. 9.66 × 4 =
  10. 10.18 × 8 =
  11. 11.39 × 8 =
  12. 12.36 × 8 =
  13. 13.12 × 8 =
  14. 14.65 × 4 =
  15. 15.23 × 8 =
  16. 16.19 × 8 =
  17. 17.12 × 4 =
  18. 18.25 × 4 =
  19. 19.54 × 4 =
  20. 20.40 × 4 =
  21. 21.14 × 8 =
  22. 22.21 × 8 =
  23. 23.26 × 4 =
  24. 24.50 × 4 =
  25. 25.23 × 4 =
  26. 26.19 × 4 =
  27. 27.47 × 4 =
  28. 28.15 × 8 =
  29. 29.17 × 8 =
  30. 30.32 × 4 =
  31. 31.71 × 4 =
  32. 32.34 × 4 =
  33. 33.48 × 4 =
  34. 34.24 × 4 =
  35. 35.24 × 8 =
  36. 36.69 × 4 =
  37. 37.72 × 4 =
  38. 38.30 × 8 =
  39. 39.16 × 8 =
  40. 40.52 × 4 =

Answer key

  1. 176
  2. 120
  3. 256
  4. 200
  5. 148
  6. 196
  7. 224
  8. 244
  9. 264
  10. 144
  11. 312
  12. 288
  13. 96
  14. 260
  15. 184
  16. 152
  17. 48
  18. 100
  19. 216
  20. 160
  21. 112
  22. 168
  23. 104
  24. 200
  25. 92
  26. 76
  27. 188
  28. 120
  29. 136
  30. 128
  31. 284
  32. 136
  33. 192
  34. 96
  35. 192
  36. 276
  37. 288
  38. 240
  39. 128
  40. 208

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