To write 2105 thousandths as a decimal, you would place the decimal point three places to the left of the last digit, which is 5. This would give you 0.2105 as the decimal representation of 2105 thousandths.
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2105
30 * 7 = 2105 * 7 = 3530 * 7 = 2105 * 7 = 3530 * 7 = 2105 * 7 = 3530 * 7 = 2105 * 7 = 35
There are an infinite number, the smallest 2-digit number is 35. But also these (must end in 5 or 0): 35 and 305, 350, 3005, 3050, etc 80, 800, 8000 etc. 125, 1025, 1205, 1250, etc. 215, 2015, 2105, etc. 1115, 10115, 11015, 11105, etc.
2, 3, 5, 6, 9, 10, 13, 15, 18, 26, 30, 39, 45, 65, 78, 90, 117, 130, 195, 234, 390, 421, 585, 842, 1170, 1263, 2105, 2526, 3789, 4210, 5473, 6315, 7578, 10946, 12630, 16419, 18945, 27365, 32838, 37890, 49257, 54730, 82095, 98514, 164190, 246285.
Example: 7/30 + 5/42Find the LCD by factoring them.2 x 3 x 5 = 302 x 3 x 7 = 422 x 3 x 5 x 7 = 210, the LCD30 x 7 = 21042 x 5 = 2107/30 x 7/7 = 49/2105/42 x 5/5 = 25/21049/210 + 25/210 = 74/210Simplify if necessary.7/30 + 5/42 = 37/105