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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 951 · 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. 1.18 × 8 =
  2. 2.37 × 4 =
  3. 3.20 × 8 =
  4. 4.29 × 4 =
  5. 5.23 × 8 =
  6. 6.24 × 8 =
  7. 7.21 × 8 =
  8. 8.31 × 8 =
  9. 9.64 × 4 =
  10. 10.23 × 4 =
  11. 11.12 × 8 =
  12. 12.33 × 8 =
  13. 13.14 × 4 =
  14. 14.40 × 8 =
  15. 15.38 × 4 =
  16. 16.22 × 4 =
  17. 17.58 × 4 =
  18. 18.24 × 4 =
  19. 19.14 × 8 =
  20. 20.65 × 4 =
  21. 21.27 × 8 =
  22. 22.60 × 4 =
  23. 23.63 × 4 =
  24. 24.30 × 4 =
  25. 25.35 × 8 =
  26. 26.17 × 8 =
  27. 27.19 × 4 =
  28. 28.38 × 8 =
  29. 29.34 × 8 =
  30. 30.62 × 4 =
  31. 31.44 × 4 =
  32. 32.36 × 8 =
  33. 33.28 × 8 =
  34. 34.45 × 4 =
  35. 35.25 × 4 =
  36. 36.51 × 4 =
  37. 37.19 × 8 =
  38. 38.34 × 4 =
  39. 39.74 × 4 =
  40. 40.18 × 4 =

Answer key

  1. 144
  2. 148
  3. 160
  4. 116
  5. 184
  6. 192
  7. 168
  8. 248
  9. 256
  10. 92
  11. 96
  12. 264
  13. 56
  14. 320
  15. 152
  16. 88
  17. 232
  18. 96
  19. 112
  20. 260
  21. 216
  22. 240
  23. 252
  24. 120
  25. 280
  26. 136
  27. 76
  28. 304
  29. 272
  30. 248
  31. 176
  32. 288
  33. 224
  34. 180
  35. 100
  36. 204
  37. 152
  38. 136
  39. 296
  40. 72

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