这题用简便方法怎么做
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12.5X7.7+2.3
=12.5X8-12.5X0.3+2.3
=100-3.75+2.3
=100-1.45
=98.55
=12.5X8-12.5X0.3+2.3
=100-3.75+2.3
=100-1.45
=98.55
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12.5x7.7+2.3
=12.5x(8-0.3)+2.3
=12.5x8-12.5x0.3+2.3
=100-3.75+2.3
=100-1.45
=98.55
=12.5x(8-0.3)+2.3
=12.5x8-12.5x0.3+2.3
=100-3.75+2.3
=100-1.45
=98.55
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12.5x7.7+2.3
=12.5×(10-2.4+0.1)+2.3
=125-12.5×0.8×3+1.25+2.3
=125-30+1.25+2.3
=95+3.55
=98.55
=12.5×(10-2.4+0.1)+2.3
=125-12.5×0.8×3+1.25+2.3
=125-30+1.25+2.3
=95+3.55
=98.55
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还有懒办法,用手机计算器
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