13.5乘9.9加6.5乘10.1等于?

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13.5乘9.9加6.5乘10.1等于?
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13.5乘9.9加6.5乘10.1等于?
13.5乘9.9加6.5乘10.1等于?

13.5乘9.9加6.5乘10.1等于?
13.5*9.9+6.5*10.1
=13.5*(10-0.1)+6.5*(10+0.1)
=(13.5+6.5)*10+0.1(6.5-13.5)
=200-0.7
=199.3

13.5*9.9+6.5*10.1=199.3

13.5*9.9+6.5*10.1=133.65+65.65=199.3

199.3

13.5乘9.9加6.5乘10.1等于199.3,先算乘法,再算加法!!

13.5*9.9+6.5*10.1=6.5*9.9+7*9.9+6.5*10.1=6.5*(10.1+9.9)+7*(10-0.1)=6.5*20+70-0.7=200-0.7=199.3