Treat them exactly like you would adding up whole numbers but align all the columns so that the decimals points are all in line/column and carry this point (and its position) down into the answer.
077.2
033.05
110.91
--------
221.16
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The rational numbers
Prime factorization refers to integers.
plus sign (+), minus (-), number (#), decimal point for decimals and money, percent (%), dollar sign ($), equal (=)
Two of them are terminating decimals and recurring decimals
make it easier by taking out the decimals to begin with, then rearrange so: -49+84= 84-49= 35+12= 47 or 4.7