Multiply by 9 and 99 Worksheet
The trick (Ekanyunena Purvena): Write the number with as many digits as there are nines (add zeros in front if needed). Left part: the number minus 1. Right part: “all from 9 and the last from 10” of the number. More digits than the nines (237 × 99)? Split off as many digits as there are nines (2 | 37): left = number − (front part + 1) = 234, right = complement of 37 = 63 → 23463.
NameDateTime takenScore ___ / 40
- 1.4 × 9 =
- 2.889 × 99 =
- 3.6896 × 999 =
- 4.4 × 9 =
- 5.7 × 99 =
- 6.2 × 999 =
- 7.2 × 9 =
- 8.71 × 99 =
- 9.151 × 999 =
- 10.218 × 999 =
- 11.49 × 99 =
- 12.715 × 999 =
- 13.6362 × 999 =
- 14.57 × 99 =
- 15.55 × 99 =
- 16.92 × 99 =
- 17.12925 × 999 =
- 18.11 × 99 =
- 19.56 × 9 =
- 20.33 × 99 =
- 21.5 × 9 =
- 22.69 × 9 =
- 23.2 × 9 =
- 24.3 × 9 =
- 25.5 × 9 =
- 26.17 × 99 =
- 27.12 × 99 =
- 28.4 × 9 =
- 29.53 × 99 =
- 30.51 × 99 =
- 31.5 × 9 =
- 32.95 × 99 =
- 33.331 × 999 =
- 34.4 × 9 =
- 35.2 × 9 =
- 36.1936 × 99 =
- 37.181 × 9 =
- 38.2 × 9 =
- 39.95 × 99 =
- 40.3 × 9 =
Answer key
- 36
- 88011
- 6889104
- 36
- 693
- 1998
- 18
- 7029
- 150849
- 217782
- 4851
- 714285
- 6355638
- 5643
- 5445
- 9108
- 12912075
- 1089
- 504
- 3267
- 45
- 621
- 18
- 27
- 45
- 1683
- 1188
- 36
- 5247
- 5049
- 45
- 9405
- 330669
- 36
- 18
- 191664
- 1629
- 18
- 9405
- 27
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