60又2/3乘以59又1/3 简便计算!

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60又2/3乘以59又1/3简便计算!60又2/3乘以59又1/3简便计算!60又2/3乘以59又1/3简便计算!(60+2/3)*(59+1/3)=(60+2/3)*(60-2/3)=60^2-(2

60又2/3乘以59又1/3 简便计算!
60又2/3乘以59又1/3 简便计算!

60又2/3乘以59又1/3 简便计算!
(60+2/3)*(59+1/3)
=(60+2/3)*(60-2/3)
=60^2-(2/3)^2
=3600-4/9
=3599+1-4/9
=3599+5/9
=3599又5/9