53.5x1.9+61x1.25+41x8.1简算
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53.5x1.9+61x1.25+41x8.1简算53.5x1.9+61x1.25+41x8.1简算53.5x1.9+61x1.25+41x8.1简算53.5x1.9+61x1.25+41x8.1=5
53.5x1.9+61x1.25+41x8.1简算
53.5x1.9+61x1.25+41x8.1简算
53.5x1.9+61x1.25+41x8.1简算
53.5x1.9+61x1.25+41x8.1 =53.5x（2-0.1）+（60+1）x1.25+（40+1）x8.1 =53.5x2-53.5x0.1+60x1.25+1x1.25+40x8.1+1x8.1=107-5.35+75+1.25+324+8.1=(107+75+324)+(1.25-5.35+8.1)=506+4=510
53.5x1.9+61x1.25+41x8.1简算
41.2X8.1+11X1.25+53.7X1.9
41.2x8.1+11x1.25+53.7x1.9
41.8x8.1+11x1.25+53.7x1.9=?
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(-8/25)x1.25x(-8)计算
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