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
- 1.521 × 999 =
- 2.37 × 99 =
- 3.52 × 99 =
- 4.647 × 99 =
- 5.179 × 999 =
- 6.4 × 9 =
- 7.17 × 9 =
- 8.28961 × 999 =
- 9.7 × 9 =
- 10.931 × 999 =
- 11.193 × 9 =
- 12.6 × 9 =
- 13.9 × 999 =
- 14.5 × 9 =
- 15.92 × 999 =
- 16.1902 × 99 =
- 17.2161 × 99 =
- 18.8 × 9 =
- 19.21 × 99 =
- 20.4514 × 999 =
- 21.87 × 99 =
- 22.387 × 999 =
- 23.6 × 99 =
- 24.511 × 99 =
- 25.2072 × 99 =
- 26.128 × 999 =
- 27.548 × 999 =
- 28.37 × 99 =
- 29.51 × 99 =
- 30.506 × 999 =
- 31.15 × 99 =
- 32.4 × 9 =
- 33.847 × 99 =
- 34.2 × 9 =
- 35.871 × 999 =
- 36.753 × 999 =
- 37.134 × 9 =
- 38.7 × 9 =
- 39.11043 × 999 =
- 40.4 × 9 =
Answer key
- 520479
- 3663
- 5148
- 64053
- 178821
- 36
- 153
- 28932039
- 63
- 930069
- 1737
- 54
- 8991
- 45
- 91908
- 188298
- 213939
- 72
- 2079
- 4509486
- 8613
- 386613
- 594
- 50589
- 205128
- 127872
- 547452
- 3663
- 5049
- 505494
- 1485
- 36
- 83853
- 18
- 870129
- 752247
- 1206
- 63
- 11031957
- 36
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