(1.2×10^-4)^2×(5x10^2)^2÷(3x10^-2)^2

问题描述:

(1.2×10^-4)^2×(5x10^2)^2÷(3x10^-2)^2

(1.2×10^-4)^2×(5×10^2)^2÷(3×10^-2)^2
=1.44×10^-8×25×10^4÷9×10^4
=1.44×25÷9
=4
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