To determine the order from least to greatest, we can compare each set of decimals.
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1.9, 1.091, 1.09
- Here, 1.09 is less than 1.091, and both are less than 1.9.
- Order: 1.09, 1.091, 1.9
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1.09, 1.9, 1.92
- 1.09 is less than 1.9, and 1.9 is less than 1.92.
- Order: 1.09, 1.9, 1.92
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1.9, 1.09, 1.009
- 1.009 is less than 1.09, and both are less than 1.9.
- Order: 1.009, 1.09, 1.9
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1.99, 1.9, 1.09
- 1.09 is less than 1.9, which is less than 1.99.
- Order: 1.09, 1.9, 1.99
From the analysis, the correct order for each set is:
- 1.09, 1.091, 1.9
- 1.09, 1.9, 1.92
- 1.009, 1.09, 1.9
- 1.09, 1.9, 1.99
Among these, the set that is in correct order is from the first response:
1.09, 1.091, 1.9.
Thus, the decimal set in order from least to greatest is: 1.09, 1.091, 1.9.