Question

1.6✘2.5+4✘0.25-2.5的简便方法怎么做？

这个题的简便方法怎么做

Answer 1

解，原式=(4x0.4)x2.5-1-2.5
=4x(0.4x2.5)-1-2.5
=4-1-2.5
=3-2.5
=0.5

Answer 2

=1.6*2.5+0.4*2.5-1*2.5
=(1.6+0.4-1)*2.5
=1*2.5
=2.5

Answer 3

原式=1.6×10×0.25+4×0.25+10×0.25
=（16+4+10）×0.25
=30×0.25
=7.5

Answer 4

=1.6*2.5+0.4*2.5-2.5
=2.5*(1.6+0.4-1)
=2.5

Answer 5

原式=(1.6-1)x2.5+4x0.25=0.6x2.5+1=1.5+1=2.5