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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 211 · 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. 1.29 × 8 =
  2. 2.42 × 4 =
  3. 3.15 × 8 =
  4. 4.63 × 4 =
  5. 5.41 × 4 =
  6. 6.30 × 8 =
  7. 7.36 × 8 =
  8. 8.26 × 8 =
  9. 9.37 × 4 =
  10. 10.24 × 8 =
  11. 11.28 × 8 =
  12. 12.21 × 8 =
  13. 13.23 × 8 =
  14. 14.57 × 4 =
  15. 15.33 × 8 =
  16. 16.24 × 4 =
  17. 17.19 × 8 =
  18. 18.30 × 4 =
  19. 19.34 × 4 =
  20. 20.18 × 4 =
  21. 21.61 × 4 =
  22. 22.26 × 4 =
  23. 23.37 × 8 =
  24. 24.35 × 8 =
  25. 25.29 × 4 =
  26. 26.69 × 4 =
  27. 27.74 × 4 =
  28. 28.46 × 4 =
  29. 29.13 × 4 =
  30. 30.58 × 4 =
  31. 31.43 × 4 =
  32. 32.12 × 4 =
  33. 33.67 × 4 =
  34. 34.14 × 8 =
  35. 35.28 × 4 =
  36. 36.72 × 4 =
  37. 37.20 × 8 =
  38. 38.36 × 4 =
  39. 39.51 × 4 =
  40. 40.22 × 8 =

Answer key

  1. 232
  2. 168
  3. 120
  4. 252
  5. 164
  6. 240
  7. 288
  8. 208
  9. 148
  10. 192
  11. 224
  12. 168
  13. 184
  14. 228
  15. 264
  16. 96
  17. 152
  18. 120
  19. 136
  20. 72
  21. 244
  22. 104
  23. 296
  24. 280
  25. 116
  26. 276
  27. 296
  28. 184
  29. 52
  30. 232
  31. 172
  32. 48
  33. 268
  34. 112
  35. 112
  36. 288
  37. 160
  38. 144
  39. 204
  40. 176

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