41.2*3.6+16*5/4+53.7*6.4 =?
41.2*3.6+16*5/4+53.7*6.4=41.2*(10-6.4)+16*5/4+53.7*6.4=412+(53.7-41.2)*6.4+16*1.25=41...
41.2*3.6+16*5/4+53.7*6.4
=41.2*(10-6.4)+16*5/4+53.7*6.4
=412+(53.7-41.2)*6.4+16*1.25
=412+1.25*64+16*1.25
=412+1.25*80
=412+100
=512 展开
=41.2*(10-6.4)+16*5/4+53.7*6.4
=412+(53.7-41.2)*6.4+16*1.25
=412+1.25*64+16*1.25
=412+1.25*80
=412+100
=512 展开
3个回答
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41.2*3.6+16*5/4+53.7*6.4
= 412*36/100 + 16*5/4+537*64/100
= (412*36+537*64)/100 + 16*5/4
= (412*36+412*64+125*64)/100 + 16*5/4
= (412*100+125*64)/100 + 16*5/4
= 412 +125*64/100 + 16*5/4
= 412 + 5*64/4 + 16*5/4
= 412 + 5*16 + 4*5
= 412 + 80 + 20
= 512
= 412*36/100 + 16*5/4+537*64/100
= (412*36+537*64)/100 + 16*5/4
= (412*36+412*64+125*64)/100 + 16*5/4
= (412*100+125*64)/100 + 16*5/4
= 412 +125*64/100 + 16*5/4
= 412 + 5*64/4 + 16*5/4
= 412 + 5*16 + 4*5
= 412 + 80 + 20
= 512
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148.32+20+343.68=512
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