2.2*125%+7.8/80% 简便计算

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2.2*125%+7.8/80% 简便计算
2.2*125%+7.8/80% 简便计算

2.2*125%+7.8/80% 简便计算
2.2*125%+7.8/80%
=2.2*125%+7.8*125%
=(2.2+7.8)*1.25
=12.5

2.2*125%+7.8/80%
=2.2*1.25+7.8*1.25
=1.25*(2.2+7.8)
=1.25*10
=12.5

2.2*125%+7.8/80%
=2.2*1.25+7.8*1.25
=(2.2+7.8)*1.25
=10*1.25
=12.5

2.2*125%+7.8/80%
=2.2*1.25+7.8*1.25
=(2.2+7.8)*1.25
=10*1.25
=12.5

2×125%+7.8÷80%
=2×5/4+7.8×5/4
=5/4×(2+7.8)
=1.25×(10-0.2)
=12.5-0.25
=12.25