按照您的指示进行计算，可以得到乘积结果1.76×7.513.2。一点六乘以七点五乘以一点二五用简便算法

1.6x7.5x1.25

=(0.4x4)x7.5x1.25

=(0.4x7.5)x(4x1.25)

=(4x0.75)x5

=3x5

=15

简便计算0.55乘七点5-0点5×6点五

0.55乘七点5-0点5×6点五

=(0.5 0.05)x7.5-0.5x6.5

=0.5x7.5 0.05x7.5-0.5x6.5

=0.5x(7.5-6.5) 0.375

=0.5x1 0.375

=0.5 0.375

=0.875