← Multiply by 4 and 8 by doubling lesson New set →

Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 573 · 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. 1.37 × 8 =
  2. 2.28 × 4 =
  3. 3.45 × 4 =
  4. 4.18 × 4 =
  5. 5.17 × 8 =
  6. 6.13 × 8 =
  7. 7.31 × 4 =
  8. 8.49 × 4 =
  9. 9.64 × 4 =
  10. 10.36 × 4 =
  11. 11.26 × 8 =
  12. 12.15 × 8 =
  13. 13.57 × 4 =
  14. 14.40 × 8 =
  15. 15.16 × 4 =
  16. 16.35 × 4 =
  17. 17.12 × 8 =
  18. 18.21 × 4 =
  19. 19.27 × 8 =
  20. 20.71 × 4 =
  21. 21.68 × 4 =
  22. 22.19 × 8 =
  23. 23.30 × 4 =
  24. 24.31 × 8 =
  25. 25.24 × 8 =
  26. 26.36 × 8 =
  27. 27.46 × 4 =
  28. 28.53 × 4 =
  29. 29.52 × 4 =
  30. 30.16 × 8 =
  31. 31.29 × 4 =
  32. 32.22 × 8 =
  33. 33.25 × 8 =
  34. 34.21 × 8 =
  35. 35.56 × 4 =
  36. 36.70 × 4 =
  37. 37.74 × 4 =
  38. 38.50 × 4 =
  39. 39.19 × 4 =
  40. 40.72 × 4 =

Answer key

  1. 296
  2. 112
  3. 180
  4. 72
  5. 136
  6. 104
  7. 124
  8. 196
  9. 256
  10. 144
  11. 208
  12. 120
  13. 228
  14. 320
  15. 64
  16. 140
  17. 96
  18. 84
  19. 216
  20. 284
  21. 272
  22. 152
  23. 120
  24. 248
  25. 192
  26. 288
  27. 184
  28. 212
  29. 208
  30. 128
  31. 116
  32. 176
  33. 200
  34. 168
  35. 224
  36. 280
  37. 296
  38. 200
  39. 76
  40. 288

Free mental maths lessons, practice and worksheets at talentjr.in/mental-maths