15.25x4+1.75÷0.25
=15.25x4+1.75÷1/4
=15.25x4+1.75×4
=（15.25+1.75）x4
=17×4
=68
=15.25x4+1.75÷1/4 =（15.25+1.75）x4 =17x4 =68
原式=（15+0.25）x4+(1+0.75)除以0.25
=（60+1）+（4+3）
=61+7
=68
15.25×4+1.75÷(1/4)
=15.25×4+1.75×4
=4×(15.25+1.75)
=4×17
=68
15.25x4+1.75÷0.25
=15.25x4+1.75x4
=（15.25+1.75）x4
=17x4
=68
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