计算:1+1.4×2.5
1+1.4×2.5=1+3.5=4.5
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(1)Vp=0.8*120=96
p=96/V
(2)p(1)=96/1=96
(3)当p≤192时,
192V≥96,V≥96/192=0.5
【小于】应该改成【不小于】
1+1.4×2.5
=1+【1x2.5】+【0.4x2.5】
=1+2.5+2.5×0.4
=1+2.5+1
=3.5+1
=4.5
1+1.4×2.5
=1+(1+0.4)×2.5
=1+2.5+2.5×0.4
=1+2.5+1
=4.5
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