(4+1.23+4.5)×(1.23+4.5+5.6)-(4+1.23+4.5+5.6)×(1.2
(4+1.23+4.5)×(1.23+4.5+5.6)-(4+1.23+4.5+5.6)×(1.23+4.5)第等式巧算,求大师全过程...
(4+1.23+4.5)×(1.23+4.5+5.6)-(4+1.23+4.5+5.6)×(1.23+4.5) 第等式巧算,求大师全过程
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(4+1.23+4.5)*(1.23+4.5+5.6)-(4+1.23+4.5+5.6)*(1.23+4.5)
=(4+1.23+4.5)*(1.23+4.5)+(4+1.23+4.5)*5.6-(((4+1.23+4.5))*(1.23+4.5)+5.6*(1.23+4.5))
=(4+1.23+4.5)*(1.23+4.5)+(4+1.23+4.5)*5.6-((4+1.23+4.5))*(1.23+4.5)-5.6*(1.23+4.5)
=(4+1.23+4.5)*5.6-(1.23+4.5)*5.6
=((4+1.23+4.5)-(1.23+4.5))*5.6
=4*5.6
=22.4
=(4+1.23+4.5)*(1.23+4.5)+(4+1.23+4.5)*5.6-(((4+1.23+4.5))*(1.23+4.5)+5.6*(1.23+4.5))
=(4+1.23+4.5)*(1.23+4.5)+(4+1.23+4.5)*5.6-((4+1.23+4.5))*(1.23+4.5)-5.6*(1.23+4.5)
=(4+1.23+4.5)*5.6-(1.23+4.5)*5.6
=((4+1.23+4.5)-(1.23+4.5))*5.6
=4*5.6
=22.4
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上式= (4+1.23+4.5) × (1.23+4.5+5.6) - (1.23+4.5+5.6) × (1.23+4.5) - 4 × (1.23+4.5)
=4 × (1.23+4.5+5.6) - 4 ×(1.23 + 5.6)
= 4 × 5.6 =22.4
=4 × (1.23+4.5+5.6) - 4 ×(1.23 + 5.6)
= 4 × 5.6 =22.4
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