Answer:
5
+ 0.6
+ 0.02
+ 0.009
Explanation:
5 × 1
+ 6 × 0.1
+ 2 × 0.01
+ 9 × 0.001
5 × 100
+ 6 × 10-1
+ 2 × 10-2
+ 9 × 10-3
all of them are correct
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