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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 429 · 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. 2.44 × 4 =
  3. 3.26 × 4 =
  4. 4.51 × 4 =
  5. 5.15 × 8 =
  6. 6.28 × 8 =
  7. 7.30 × 8 =
  8. 8.19 × 8 =
  9. 9.36 × 4 =
  10. 10.12 × 8 =
  11. 11.20 × 8 =
  12. 12.28 × 4 =
  13. 13.65 × 4 =
  14. 14.31 × 8 =
  15. 15.38 × 4 =
  16. 16.24 × 8 =
  17. 17.17 × 8 =
  18. 18.37 × 8 =
  19. 19.18 × 4 =
  20. 20.29 × 8 =
  21. 21.36 × 8 =
  22. 22.30 × 4 =
  23. 23.34 × 4 =
  24. 24.18 × 8 =
  25. 25.13 × 8 =
  26. 26.25 × 4 =
  27. 27.32 × 8 =
  28. 28.27 × 8 =
  29. 29.42 × 4 =
  30. 30.59 × 4 =
  31. 31.17 × 4 =
  32. 32.46 × 4 =
  33. 33.57 × 4 =
  34. 34.66 × 4 =
  35. 35.61 × 4 =
  36. 36.67 × 4 =
  37. 37.34 × 8 =
  38. 38.33 × 4 =
  39. 39.70 × 4 =
  40. 40.14 × 8 =

Answer key

  1. 176
  2. 176
  3. 104
  4. 204
  5. 120
  6. 224
  7. 240
  8. 152
  9. 144
  10. 96
  11. 160
  12. 112
  13. 260
  14. 248
  15. 152
  16. 192
  17. 136
  18. 296
  19. 72
  20. 232
  21. 288
  22. 120
  23. 136
  24. 144
  25. 104
  26. 100
  27. 256
  28. 216
  29. 168
  30. 236
  31. 68
  32. 184
  33. 228
  34. 264
  35. 244
  36. 268
  37. 272
  38. 132
  39. 280
  40. 112

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