12.5*(81*1.7+8.1*8.3) 要巧算!
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12.5*(81*1.7+8.1*8.3)要巧算!12.5*(81*1.7+8.1*8.3)要巧算!12.5*(81*1.7+8.1*8.3)要巧算!12.5*(81*1.7+81*8.3)=12.5
12.5*(81*1.7+8.1*8.3) 要巧算!
12.5*(81*1.7+8.1*8.3) 要巧算!
12.5*(81*1.7+8.1*8.3) 要巧算!
12.5*(81*1.7+81*8.3)
=12.5*81*(1.7+8.3)
=12.5*81*10
=125*(80+1)
=125*80+125
=10000+125
=10125
12.5*(81*1.7+8.1*8.3) 要巧算!
12.5*(81*1.7+8.1*8.3) 要巧算!是12.5×(81×1.7+8.1×8.3)不是12.5×(8.1×1.7+8.1×8.3)大家注意啊!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
0.58*1.7+1.7*1.42+8.3*2
0.25×32×1.7×12.5
1.7X+8.3X=0.
x+1.7x=8.1怎么作?
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