Answer:
3×1/10 +5×1/100 +6×1/1000
Step-by-step explanation:
You have not shown Armando's work, but we know there are several ways that expanded form can be written:
0.356 = 0.3 + 0.05 + 0.006
= 3×0.1 + 5×0.01 + 6×0.001
= 3×10^-1 + 5×10^-2 + 6×10^-3
When the place values are expressed as fractions, this is ...
= 3×1/10 + 5×1/100 + 6×1/1000
