Oh, dude, expanded notation is like breaking down numbers into their place values. So, for 6.57, you'd write it as 6 + 0.5 + 0.07. It's basically like saying, "Hey, let's show off all the parts of this number in a fancy way."
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Write 2,784 in expanded notation as the sum of multiplication expressions
for 230 in expanded notation it well look like [2x100]+[3x10]= 200+30= 230
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15.083