0.25×8.19-0.25×4.19

问题描述:

0.25×8.19-0.25×4.19

0.25×8.19-0.25×4.19
=0.25×(8.19-4.19)
=0.25×4
=1

=【8.19-4.19】×0.25
=4×0.25
=1

0.25×8.19-0.25×4.19
=0.25 ×(8.19-4.19)
=0.25×4
=1
所以答案是1