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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 526 · 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. 1.35 × 4 =
  2. 2.21 × 8 =
  3. 3.62 × 4 =
  4. 4.41 × 4 =
  5. 5.57 × 4 =
  6. 6.25 × 8 =
  7. 7.27 × 8 =
  8. 8.49 × 4 =
  9. 9.60 × 4 =
  10. 10.68 × 4 =
  11. 11.42 × 4 =
  12. 12.43 × 4 =
  13. 13.56 × 4 =
  14. 14.26 × 4 =
  15. 15.28 × 4 =
  16. 16.12 × 8 =
  17. 17.61 × 4 =
  18. 18.33 × 4 =
  19. 19.36 × 8 =
  20. 20.20 × 8 =
  21. 21.39 × 4 =
  22. 22.72 × 4 =
  23. 23.13 × 8 =
  24. 24.32 × 8 =
  25. 25.19 × 8 =
  26. 26.47 × 4 =
  27. 27.27 × 4 =
  28. 28.16 × 4 =
  29. 29.31 × 8 =
  30. 30.50 × 4 =
  31. 31.29 × 4 =
  32. 32.44 × 4 =
  33. 33.40 × 8 =
  34. 34.65 × 4 =
  35. 35.33 × 8 =
  36. 36.64 × 4 =
  37. 37.52 × 4 =
  38. 38.55 × 4 =
  39. 39.14 × 8 =
  40. 40.38 × 4 =

Answer key

  1. 140
  2. 168
  3. 248
  4. 164
  5. 228
  6. 200
  7. 216
  8. 196
  9. 240
  10. 272
  11. 168
  12. 172
  13. 224
  14. 104
  15. 112
  16. 96
  17. 244
  18. 132
  19. 288
  20. 160
  21. 156
  22. 288
  23. 104
  24. 256
  25. 152
  26. 188
  27. 108
  28. 64
  29. 248
  30. 200
  31. 116
  32. 176
  33. 320
  34. 260
  35. 264
  36. 256
  37. 208
  38. 220
  39. 112
  40. 152

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