0.52×6.5+3.5×0.48怎么简便运算呢？
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0.52×6.5+3.5×0.48
=0.52×6.5+3.5×(1-0.52)
=0.52×6.5+3.5-3.5×0.52
=0.52×(6.5-3.5)+3.5
=0.52×3+3.5
=1.56+3.5
=5.06
=0.52×6.5+3.5×(1-0.52)
=0.52×6.5+3.5-3.5×0.52
=0.52×(6.5-3.5)+3.5
=0.52×3+3.5
=1.56+3.5
=5.06
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0.52*6.5+3.5*0.48
解:原式=0.52*(6+0.5)+(3+0.5)*0.48
=2*3*0.52+0.52*0.5+3*0.48+0.5*0.48
=3*(2*0.52+0.48)+0.5*(0.52+0.48)
=3*(1.04+0.48)+0.5*1
=3*1.52+0.5
=5.06
解:原式=0.52*(6+0.5)+(3+0.5)*0.48
=2*3*0.52+0.52*0.5+3*0.48+0.5*0.48
=3*(2*0.52+0.48)+0.5*(0.52+0.48)
=3*(1.04+0.48)+0.5*1
=3*1.52+0.5
=5.06
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原式=（0.5+0.02）×6.5+3.5×(0.5-0.02)
=0.5×(6.5+3.5)+0.02×(6.5-3.5)
=0.5×10+0.02×3
=5+0.06
=5.06.
=0.5×(6.5+3.5)+0.02×(6.5-3.5)
=0.5×10+0.02×3
=5+0.06
=5.06.
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