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计算:0.25×0.25×···×0.25×4×4×···×4(72个)(70个)0.25有72个,4有70个.

题目详情
计算:0.25×0.25×···×0.25×4×4×···×4 ( 72个 )( 70个 )
0.25有72个,4有70个.
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答案和解析
0.25×0.25×···×0.25×4×4×···×4 ( 72个 )( 70个 )
=0.25×0.25(70个0.25) × 4×4×4(70个4) × 0.25×0.25
=(0.25×4)×0.25×0.25
70个
=1×0.25×0.25
=0.0625
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