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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 817 · 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. 2.26 × 8 =
  3. 3.61 × 4 =
  4. 4.37 × 8 =
  5. 5.21 × 8 =
  6. 6.28 × 8 =
  7. 7.47 × 4 =
  8. 8.62 × 4 =
  9. 9.34 × 8 =
  10. 10.31 × 4 =
  11. 11.64 × 4 =
  12. 12.22 × 8 =
  13. 13.19 × 8 =
  14. 14.68 × 4 =
  15. 15.14 × 8 =
  16. 16.50 × 4 =
  17. 17.67 × 4 =
  18. 18.23 × 8 =
  19. 19.60 × 4 =
  20. 20.37 × 4 =
  21. 21.30 × 8 =
  22. 22.15 × 8 =
  23. 23.55 × 4 =
  24. 24.29 × 4 =
  25. 25.17 × 8 =
  26. 26.25 × 8 =
  27. 27.27 × 4 =
  28. 28.23 × 4 =
  29. 29.24 × 8 =
  30. 30.72 × 4 =
  31. 31.48 × 4 =
  32. 32.65 × 4 =
  33. 33.33 × 4 =
  34. 34.53 × 4 =
  35. 35.19 × 4 =
  36. 36.40 × 8 =
  37. 37.18 × 4 =
  38. 38.14 × 4 =
  39. 39.45 × 4 =
  40. 40.44 × 4 =

Answer key

  1. 140
  2. 208
  3. 244
  4. 296
  5. 168
  6. 224
  7. 188
  8. 248
  9. 272
  10. 124
  11. 256
  12. 176
  13. 152
  14. 272
  15. 112
  16. 200
  17. 268
  18. 184
  19. 240
  20. 148
  21. 240
  22. 120
  23. 220
  24. 116
  25. 136
  26. 200
  27. 108
  28. 92
  29. 192
  30. 288
  31. 192
  32. 260
  33. 132
  34. 212
  35. 76
  36. 320
  37. 72
  38. 56
  39. 180
  40. 176

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