Question

Сравните:
$(2.1 \times 10 ^{ - 1} ) \times (4 \times 10 ^{ - 2} )$
и 0.008

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Answer 1

Ответ :(2, 1×10^-1)×(4×10^-2)=(2,1×4)×(10^-1×10^-2)=8,4×10^-1-2=8,4×10-3=0,0081