0.001 = (0 x 1) . (0/10) + (0/100) + (1/1000)
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4+.3+.05+.001+.0002
4 + .9 + .03 + .001 is the expanded form of 4.931. To find the expanded form of a number, separate the number by the digits, multiply each digit by its place value, and the write it as a sum that hasn't been evaluated: 4(1) + 9(.1) + 3(.01) + 1(.001) = 4 + .9 + .03 + .001
.001+.0002
8 + .200 + .040 + .001
You would write it like this 200,000,000,000+ 30,000,000,000+ 8,000,000,000+ 500,000,000+ 40,000,000+ 2,000,000+ 600,000+ 50,000+ 1.