← 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 388 · 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. 1.50 × 4 =
  2. 2.55 × 4 =
  3. 3.35 × 4 =
  4. 4.37 × 8 =
  5. 5.36 × 8 =
  6. 6.40 × 8 =
  7. 7.23 × 8 =
  8. 8.16 × 8 =
  9. 9.29 × 8 =
  10. 10.13 × 8 =
  11. 11.25 × 8 =
  12. 12.57 × 4 =
  13. 13.49 × 4 =
  14. 14.27 × 8 =
  15. 15.14 × 4 =
  16. 16.18 × 4 =
  17. 17.33 × 4 =
  18. 18.31 × 8 =
  19. 19.71 × 4 =
  20. 20.65 × 4 =
  21. 21.42 × 4 =
  22. 22.53 × 4 =
  23. 23.75 × 4 =
  24. 24.20 × 8 =
  25. 25.48 × 4 =
  26. 26.30 × 8 =
  27. 27.23 × 4 =
  28. 28.32 × 4 =
  29. 29.12 × 4 =
  30. 30.69 × 4 =
  31. 31.58 × 4 =
  32. 32.38 × 8 =
  33. 33.24 × 4 =
  34. 34.74 × 4 =
  35. 35.27 × 4 =
  36. 36.45 × 4 =
  37. 37.28 × 8 =
  38. 38.35 × 8 =
  39. 39.25 × 4 =
  40. 40.14 × 8 =

Answer key

  1. 200
  2. 220
  3. 140
  4. 296
  5. 288
  6. 320
  7. 184
  8. 128
  9. 232
  10. 104
  11. 200
  12. 228
  13. 196
  14. 216
  15. 56
  16. 72
  17. 132
  18. 248
  19. 284
  20. 260
  21. 168
  22. 212
  23. 300
  24. 160
  25. 192
  26. 240
  27. 92
  28. 128
  29. 48
  30. 276
  31. 232
  32. 304
  33. 96
  34. 296
  35. 108
  36. 180
  37. 224
  38. 280
  39. 100
  40. 112

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