? ( 1)0.0 1×0.0 1×0.0 1 = 0.0000 1 = 10-6 m3；

? (2)1÷10-6 =100000 =1ten thousand.

2.( 1) Because 1 micron =10-6m, 0.0003x10-6 = 3x10-/0;

? (2)350÷5× 108 = 7× 10-7 mm2；

? (3) 1× 10-9×60000 = 6× 10-5m。

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