6.6乘1.25加0.12乘12.5加0.022乘125的简便运算？
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6.6×1.25+0.12×12.5+0.022×125
=6.6×1.25+0.12×1.25×10+0.022×1.25×100
=6.6×1.25+1.2×1.25+2.2×1.25
=(6.6+1.2+2.2)×1.25
=10×1.25
=12.5
=6.6×1.25+0.12×1.25×10+0.022×1.25×100
=6.6×1.25+1.2×1.25+2.2×1.25
=(6.6+1.2+2.2)×1.25
=10×1.25
=12.5
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