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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 787 · 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. 1.37 × 8 =
  2. 2.72 × 4 =
  3. 3.14 × 8 =
  4. 4.22 × 8 =
  5. 5.14 × 4 =
  6. 6.70 × 4 =
  7. 7.28 × 8 =
  8. 8.12 × 8 =
  9. 9.16 × 4 =
  10. 10.33 × 4 =
  11. 11.39 × 4 =
  12. 12.21 × 8 =
  13. 13.25 × 4 =
  14. 14.15 × 8 =
  15. 15.41 × 4 =
  16. 16.65 × 4 =
  17. 17.35 × 8 =
  18. 18.25 × 8 =
  19. 19.36 × 8 =
  20. 20.62 × 4 =
  21. 21.57 × 4 =
  22. 22.56 × 4 =
  23. 23.34 × 8 =
  24. 24.44 × 4 =
  25. 25.40 × 4 =
  26. 26.20 × 8 =
  27. 27.19 × 8 =
  28. 28.16 × 8 =
  29. 29.59 × 4 =
  30. 30.45 × 4 =
  31. 31.38 × 4 =
  32. 32.38 × 8 =
  33. 33.24 × 8 =
  34. 34.39 × 8 =
  35. 35.18 × 8 =
  36. 36.30 × 4 =
  37. 37.26 × 8 =
  38. 38.51 × 4 =
  39. 39.42 × 4 =
  40. 40.12 × 4 =

Answer key

  1. 296
  2. 288
  3. 112
  4. 176
  5. 56
  6. 280
  7. 224
  8. 96
  9. 64
  10. 132
  11. 156
  12. 168
  13. 100
  14. 120
  15. 164
  16. 260
  17. 280
  18. 200
  19. 288
  20. 248
  21. 228
  22. 224
  23. 272
  24. 176
  25. 160
  26. 160
  27. 152
  28. 128
  29. 236
  30. 180
  31. 152
  32. 304
  33. 192
  34. 312
  35. 144
  36. 120
  37. 208
  38. 204
  39. 168
  40. 48

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