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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 610 · 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. 1.19 × 4 =
  2. 2.36 × 4 =
  3. 3.27 × 4 =
  4. 4.21 × 4 =
  5. 5.12 × 4 =
  6. 6.41 × 4 =
  7. 7.38 × 4 =
  8. 8.68 × 4 =
  9. 9.23 × 4 =
  10. 10.14 × 8 =
  11. 11.25 × 4 =
  12. 12.26 × 8 =
  13. 13.53 × 4 =
  14. 14.22 × 4 =
  15. 15.21 × 8 =
  16. 16.25 × 8 =
  17. 17.32 × 4 =
  18. 18.29 × 8 =
  19. 19.57 × 4 =
  20. 20.43 × 4 =
  21. 21.12 × 8 =
  22. 22.51 × 4 =
  23. 23.60 × 4 =
  24. 24.34 × 8 =
  25. 25.30 × 8 =
  26. 26.19 × 8 =
  27. 27.55 × 4 =
  28. 28.62 × 4 =
  29. 29.37 × 8 =
  30. 30.47 × 4 =
  31. 31.69 × 4 =
  32. 32.67 × 4 =
  33. 33.31 × 4 =
  34. 34.38 × 8 =
  35. 35.72 × 4 =
  36. 36.15 × 8 =
  37. 37.16 × 8 =
  38. 38.23 × 8 =
  39. 39.56 × 4 =
  40. 40.37 × 4 =

Answer key

  1. 76
  2. 144
  3. 108
  4. 84
  5. 48
  6. 164
  7. 152
  8. 272
  9. 92
  10. 112
  11. 100
  12. 208
  13. 212
  14. 88
  15. 168
  16. 200
  17. 128
  18. 232
  19. 228
  20. 172
  21. 96
  22. 204
  23. 240
  24. 272
  25. 240
  26. 152
  27. 220
  28. 248
  29. 296
  30. 188
  31. 276
  32. 268
  33. 124
  34. 304
  35. 288
  36. 120
  37. 128
  38. 184
  39. 224
  40. 148

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