103*97用平方差公式计算59.8*60.2 - 知识问答

103*97用平方差公式计算59.8*60.2

2个回答

103*97
=(100+3)(100-3)
=100²-3²
=10000-9
=9991
59.8*60.2
=(60-0.2)(60+0.2)
=60²-0.2²
=3600-0.04
=3599.96

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