简算:0.25×8÷20-0.785÷78.55
问题描述:
简算:0.25×8÷20-0.785÷78.55
答
0.09.........
答
0.25×8÷20-0.785÷78.55
=0.25×(2×4)÷20-0.785÷78.55
=0.25×4×2÷20-0.785÷78.55
=2÷20-0.785÷78.55
=0.1-0.009
=0.091