0.91÷4/5+1.25×1.09 (简便计算)

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0.91÷4/5+1.25×1.09(简便计算)0.91÷4/5+1.25×1.09(简便计算)0.91÷4/5+1.25×1.09(简便计算)0.91÷4/5+1.25×1.09=(1-0.09)×

0.91÷4/5+1.25×1.09 (简便计算)
0.91÷4/5+1.25×1.09 (简便计算)

0.91÷4/5+1.25×1.09 (简便计算)
0.91÷4/5+1.25×1.09
=(1-0.09)×1.25+1.25×(1+0.09)
=1.25×(1-0.09+1+0.09)
=1.25×2
=2.5